Facts Proving Evolution Left You with Some Strange Quirks

miles hey do the math that's twice the distance from Earth to Pluto and that's not the only awesome thing our body is capable of trillions of nerve connections are powering your memory non-stop according to studies after looking at 2 1 12,000 images for a mere 3 seconds most people can recall if they have seen these pictures with 92% accuracy wow your body glows emitting tiny amounts of barely visible light this glow is the product of biochemical reactions going on inside your organism the light waxes and waines throughout the day but even though it is visible you can't detect it with the uned eye from 1 to 6 lbs of your body weight is made up of bacteria and from 100 million to 1 billion bacteria can live on just one tooth in your mouth so please brush it's impossible to take your food without saliva all because the chemicals in your food must be dissolved in saliva before they get detected by your taste buds even though it sounds like a myth eating too many carrots can indeed turn your skin orange carrots have high amounts of beta carotene that's a compound that can cause kermia if you have too much of this compound in your bloodstream it'll hold on to parts of your body with thicker skin I'm talking about the soles of your feet your knees elbows palms and even certain areas around your nose but worry not this condition is not dangerous you can easily reverse it by decreasing the amount of beta katene filled food you consume the chin muscles scientifically known as the mentalis muscles look pretty quirky giving us mixed feelings just look at these creepy tiny tentacles and still they make it possible for us to create all kinds of facial expressions that involve the lips chin and cheeks and yes they are the culprits behind those weird wrinkles and crevices on the skin of your chinny chin chin all because these muscles don't pull on themselves but Yank on the skin now people can live without some organs leading a normal life the human body consists of singular organs and those that come in pairs and speaking of the latter you only need one of those to survive your small intestine is actually not so small it's taller than you measuring around 23 ft now the cornea that transparent front cover on your eyes doesn't have any blood supply instead it receives oxygen directly from the air human beings develop their unique fingerprints very early in life while they're still embryos just 3 months after being conceived by the way even if fingerprints get badly damaged they tend to grow back to their original pattern all people are born with a diving reflex it can get activated and shut bodily functions if one is drowning or is submerged in the water the human brain is by no means smooth but if you decided to to flatten all those wrinkles covering it the brain would be the size of a pillowcase but not as useful newborn babies only blink once or twice in a minute for comparison a grown-up person blinks at least 10 times within the same time our lungs are the only organs that can float on the water all because they're made up of around 300 million balloon-like structures called Alvi also even if we're perfectly healthy our lungs are never completely germ free or sterile your nose is a superhero it's your very own heater filter and humidifier this organ is lined with tiny bone-like shells called turbinates they contain blood vessels capable of heating the air and goblet cells that can help humidify the air also the air you breathe gets filtered in your nose before going further to your lungs now every time you eat something you're esophagus the organ your food travels through to reach the stomach moves in a series of wav likee contractions pushing the food forward this is known as peristalsis there's a bond between your digestive system and your brain the gut brain axis this is why stress or brain issues can affect the way your body digests food now even though hiccups are typically harmless and resolve by themselves after a couple of minutes they aren't exactly Pleasant so you should probably know that they might occur because of changes in temperature the density of your brain increases throughout your whole life all because new neural connections pop up they appear because the structure of the brain keeps changing too if you don't want to sneeze press the skin on the bridge of your nose with your fingers when you do it your brain receives an alarm signal very quickly it puts the break on all those other processes including the sneezing reflex by the way Studies have found that sneezing is your nose's way to reset a sneeze reboots the cells that line the inside of your nose they're called Ila the part of your brain that's responsible for vision is in the back of your head interestingly the right side of your brain controls the vision on the left side and vice versa if you're in some loud place for example in a club or at a concert close your ears to better hear your friends push the tus which is that pointy skin covered cartilage in front of the ear canal into your ear then turn this ear toward your friend on average when a person snores the sound doesn't get louder than 60 DB that's as loud as a regular conversation but sometimes the noise level can reach 80 DB that's as loud as a working food blender just like salamanders regrow their tails humans might be able to regenerate cartilage that's the rubber-like stuff surrounding your joints scientists have recently discovered that cartilage could repair itself this process is likely to be the most effective at the ankle not that effective in the knee and the least effective in the hip now if a person has asmia which is also called smell blindness they don't distinguish and detect smells your eyes never stop moving while taking in visual information otherwise you wouldn't be able to see the whole picture these movements go unnoticed because your brain is a great video editor it stabilizes the images and connects tons of fragments into one Smooth video the liver is the only human an organ that can regenerate completely even if it's a mere 25% of the original liver weight the organ can get back to its full size your mouth burns when you're snacking on pineapple because while you're eating this fruit it's eating you back well kind of pineapple is the only known food that contains bromay that's an enzyme that breaks down proteins luckily your stomach acid knows how to deal with the offending enzyme now we also have bacteria that can produce prod electricity living in our intestines these bacteria give off electrons which creates tiny electrical currents this might be the bacteria's way to generate energy Deja Vu might actually be something like a brain processing W there's a theory claiming that it might happen when your brain is moving information from one part to another if there's even the tiniest delay in that process your brain will get the same information twice in this this case it'll process it as an event that happened before the deck 2 gene mutation allows people to have just a few hours of sleep at night and still feel great they don't get tired and never sleep in on average such people wake up at 4 or 5 a.m. no more than 5% of the world's population has this feature your ears might pop or even hurt when you're on an airplane you can solve this problem by simply chewing some gum this opens up your ustation tube that's a small passage that connects your throat and your middle ear opening this passage helps equalize the pressure in your ears and puts an end to the popping you can also yawn to open up the ustation tubes your feet are likely to become bigger with time just like your nose and your ears you see when people grow older ligaments and tendons in their feet weaken this makes the Arches flatter and the feet become wider and longer it Mak seem there's nothing exciting about human bones unless you find them in your closet but normally they're hidden under multiple layers of cells and tissues they're dense hard and unassuming but are they your bones not only protect your internal organs and help you move but also store fat and minerals your blood cells are produced there most of the bone tissue isn't even solid how about going on a journey through your bones to see it with your own eyes but you'll need to get through several layers of other tissues first to start with you'll have to squeeze through the skin your largest organ be careful it's a Labyrinth of hair follicles sweat glands nerve endings and blood vessels where you can easily get lost right under the skin there's a layer of fat its main purpose is to keep your body warm this layer consists of tiny plastic bags each with a drop of fat and you may have a tough time navigating around the these bubbles after passing this obstacle course you're inside your muscles their cells fibrous and long are always ready to spring into action helping you transport your body wherever you need moving through this layer of tissue is tricky because such cells form bundles and that's what makes your muscles so strong imagine taking a bunch of rubber bands and stretching them hard your muscle tissue is tough like that finally you reach your destination and see a thin dense membrane it's the outer surface of a bone this layer consists mostly of connective tissue made up of proteins you also spot numerous blood vessels their tiny perpendicular branches sneak deeper into the bone to feed bone cells you notice that these branches lie in minuscule channels the inside of the surface layer is filled with stem cells they're the busiest in childhood and become less active when a person grows up but if a bone is damaged they jump back into action and get down to repairing it luckily all your bones are intact but if there was a fracture you'd see nearby vessels bleeding and forming a thick lump around the injury in about 2 days the area would be surrounded by countless bone producing cells they would begin to change turning into different kinds of cells and forming new bone between the ends of the fractured one anyway it's time to move further toward your Bone's hardest part the outer layer which is smooth and solid because of its density it's also called compact bone this kind of bone is the reason why x-rays which can normally pass through nearly anything including your body soft tissues can hardly get through your bones this part makes up 80% of your total bone mass it's incredibly hard to squeeze through the compact bone because it consists of numerous microscopic columns inside these cylinders there are even more bone producing cells and in the middle there's a central Canal that connects the Bone's nerve fibers and blood vessels the cylinders go along the bone and help to prevent it from bending or fracturing once you get through this super hard layer the picture around changes dramatically you're in spongy bone boing boing true to its name it looks like a sponge or a honeycomb that consists of tiny needles this bone tissue is way less dense than the compact bone more flexible and also much LGH lighter you notice that the spongy tissue is only near the ends of the bone you're exploring it means you're inside one of the long bones whose structure is a bit different from others in the middle it has what looks like a tunnel to you it's made of compact bone that surrounds a cavity filled with a special substance it's called yellow bone marrow and it's rich in fat but it's time to return to the spongy bone it's mostly found at the ends of long bones inside vertebrae and your joints this sponge-like tissue has Open Spaces in it they're filled with red bone marrow which produces blood cells while traveling further through the human skeleton you discover that it consists of five types of Bones long they're much longer than they are wide for example your thigh or upper arm bones and your toes and fingers flat they're thin and slightly curved these bones are like a layered cake spongy bone sandwich between two parallel layers of compact bone your ribs and most of the bones in your skull are flat bones short bones shaped like cubes they consist of a thin layer of compact bone around spongy insides short bones can be found in your wrists and ankles sesamoid these are bones surrounded by tendons and their main purpose is to hold tendons away from joints they're numerous bones in your feet hands and knees including the kneecap these bones got such a name because they look like grains of wheat irregular bones these don't fit into any category because their shape is too complicated those are most of the bones of your face and some of your skull an adult skeleton's made up of 206 bones and each of them has its own function interestingly people are born with nearly twice as many bones but as you grow up these small bones fuse together and form larger ones as a person matures if one bones broken those around it can't work properly either it usually takes about 12 weeks for a bone to heal the smallest bone in your body is dozens of times smaller than a penny this Bone's called the stapes and is located in your middle ear the tiny thing weighs as much as two sesame seeds you get a new skeleton every 10 years because every year 10% of your Bone's mineral content gets renewed the average person walks 1 to 3 million steps per year that's why Bones have to be so resilient otherwise they wouldn't cope with the pressure your longest and strongest bone is in your leg the femur that's how it's called runs from your hip to your knee even though your teeth are part of the skeletal system they don't count as bones more than half of all the bones in your body are in your hands and feet the only bone in your body that's not connected to another is the tongue bone it's a v-shaped bone at the base of your tongue that holds it in place 1% of people are born with a 13th rib your bones aren't white their color is rather yellow or pinkish from the outside and deep red inside that's because of the blood vessels in and around them if you fracture a bone ow it'll heal on its own by producing new bone cells a cast will only help it heal straight people have known how to deal with broken bones for ages in ancient Egypt around 1,600 years BCE they realigned fractured bones and bandaged them with linen now you can't control your bones you can only tell your muscles attached to your bones where to move your bones reach their maximum density at the age of 30 only 10% of the world's animals including humans are vertebrates meaning they have a skeletal system a coating of special tissue called cartilage covers a bone and prevents it from rubbing directly against another one the enamel covering your teeth is even stronger than your bones it protects the delicate tissue and nerves underneath the biggest joint in your body is actually your knee it has to be large to connect three equally big bones the femur going from your hip to your knee the kneecap and and the shim bone some joints hardly move or don't move whatsoever those are between your teeth inside the skull and between the first pair of ribs bones sore minerals for example calcium and phosphate they can be released in your bloodstream when necessary and finally the so-called Funny Bone isn't a bone at all it's a nerve that runs inside your elbow when you hit it you feel sharp piercing pain the upper arm bone the nerve runs by is called the humorous but the pain is clearly not humorous it can be funny when it happens to someone else though hey check it out your bones are designed to be used a lot every day some of them can absorb the force of two or even three times your body weight that's impressive but your teeth are even stronger when you bite something they can withstand incredible pressure up to 200 lb by the way the enamel is considered to be a part of your skeletal system whenever you rotate your hand the bones inside your forearm cross grab hold of your arm and turn your palm to face first upward and then downward you'll make sure it's true not only is your body 60% water your bones contain some liquid too about 25% of the human bone mass is made up of water the human eye has something in common with a car engine they both can't work properly without various liquids the eye needs tears as much as the engine needs oil tears should be evenly spread over the surface of your eye that's why you blink up to 20,000 times a day and your eyelid plays the role of a windshield wiper the only part of the human body that doesn't get any nutrients from blood is the cornea the clear front surface of the eye instead it's fed by Tears on the outside and special fluids on the inside when you blush it means there is incre ined blood flow in your body and then not only your cheeks but also your stomach lining gets somewhat red it's because it has plenty of blood vessels when there's more blood than usual in them the lining blushes your stomach lining gets replaced every 3 to 4 days this prevents the organ from eating itself the digestive acids there are exceptionally powerful people can accidentally swallow small objects such as glass plastic items coins and many others normally they don't cause any harm and pass through the digestive tract within 48 Hours tiny quantities of plastic you might consume by mistake won't harm you but your stomach will have problems with digesting grass grazing animals have special teeth and stomachs to process raw leaves and grass people aren't equipped that wayo the stomach is the most important protector of the immune system it contains hydrochloric acid this acid gets rid of dangerous food toxins virus vir uses and bacteria that come along with the food you eat the stomach itself would be digested by the strong acid if the mucous membrane didn't protect it you've got two really fast muscles they control your eyelids closing they're the swiftest in your body your eyes are fragile and need protection when a special reflex is triggered for example when something suddenly touches your eye these muscles only need one tenth of a second to shut the eyelids women usually link more than men plus the older you get the more frequently you do it by the way when you watch a movie with a friend you both blink in unison do you think you owe your firm handshake to your strength workouts it's more likely thanks to your pinky just kidding and still the pinky is the strongest finger out there it's responsible for 50% of the entire hand strength but the most used finger is the thumb if a person loses it their hand becomes 40 % less agile oh and the thumb has its own pulse thanks to the artery running through it your big toes carry more than 40% of your weight more than all the other toes combined all in all all your toes are a big deal they provide support and balance when you walk and when you run they help you to be faster no more than 2% of people have natural red hair they're followed by blondes about 3% and all kinds of brown Shades about 11 % but the world's most common hair colors are black and dark brown hair is almost indestructible it can be burned or affected by strong acids but that's pretty much all you can do to destroy it your hair usually stops growing at a certain length and since a hair lives for 2 to 7 years its length doesn't normally exceed 42 in tell that to this lady from China who got to the Guinness World Records with the longest hair ever in 2004 it was a bit more than 18 F 5 in Long wow what a drag Nails can grow staggeringly long too some of the longest nails in the world belong to this guy from India their combined length was 29 ft 10 in which is almost as long as a London double decker the man cut them off back in 2018 nailed it nails do help us catch small objects and peel stickers off but that's not all if you didn't have a rigid structure to press against you wouldn't be able to understand how firmly you should hold things not only your hair and nails but also your liver can grow it's the largest internal organ by mass the liver can fully regenerate from only 51% of its original Mass back to the full size at the same time constant damage to the liver will result in scars the largest organ in your whole body is the skin it makes up more than than 15% of your total body weight people lose 30,000 to 40,000 skin cells every single minute it adds up to 9 lbs of skin cells a year you know that dust in your house well now you know where some of it comes from the tongue isn't the only organ that helps you recognize taste your nose also plays a critical role in this process it's often said the nose is responsible for 75 to 95% of your taste perception try holding your nose next time you eat gnaw on an onion or eat some smoked fish it's not that you won't feel any taste at all but it's going to be way blander your taste buds won't work properly if your mouth is too dry you simply won't feel the taste until the food is covered in saliva it contains enzymes which are complex protein molecules they start to break down your food as soon as it gets into your mouth a recent study has found out that people can distinguish more than a trillion smells you tend to remember odors better than sounds or images that's why smells can evoke Distant Memories when you're asleep you don't feel any odors your sense of smell basically deactivates at night even if there's some terrible stench in your bedroom you won't notice it I'm sure my dog is relieved to hear that the color of your dream seemed to be affected by the TV you washed as a kid if it was black and white you probably see monochrome dreams more often than not if you're used to color television your dreams are likely to be colorful H what kind of dreams did people in the Middle Ages have then Knights that say KNE your heart can give you away when you lie by starting to beat faster women's hearts are usually smaller than men's that's why they have to work harder and make more beats otherwise they won't be able to pump enough blood even if you brush your teeth twice a day and never forget about mouthwash your mouth Still Remains one of the dirtiest parts of your body millions of bacteria live there the good news is that most of them are good for your health they protect your body from bad bacteria and viruses the second dirtiest place is your belly button you don't really use it after you were born so this forlorn area accumulates all kinds of germ sweat and dirt the belly button has over 2,300 bacterial species and it does do need extra attention they say eyes don't grow with the rest of the body well it's not 100% true because the eyes aren't fully developed until you're about 21 but the absolute growth Champions here are your ears and nose they never stop growing wow what was that thing about elephants again must have been a different video If all your blood vessels were stretched into a single line dang you would be in a really tough spot but they would would go round the Earth four times you can't tickle yourself no matter how hard you try you've just checked that and failed haven't you that's because your brain warns you that you're about to be tickled which it can't do if it's someone else ever wondered why you feel so sleepy after lunch one of the reasons is your circadian rhythm which runs on a 24-hour cycle it demands that you have a nap 7 hours after waking up and the food just adds to this effect is simply is that oh excuse me it's time so check this out there are people who can bend down their pinky without bending the ring finger but most find it hard or even impossible to do when they move their middle or little finger they tend to slightly bend their ring finger too yep me too glob luxation is an extremely rare condition when people can make their eyes protrude out of their sockets unfortunately this ability comes with downsides it can cause new numerous eye issues some indigenous groups of people like Tibetans can survive at altitudes as high as Mount Everest this rare ability most likely appeared after years of evolution the ancestors of modern Tibetans lived in high regions for thousands of years and develop red blood cell adaptations making it possible to survive with dangerously low levels of oxygen the baju are SE Nomads living in Southeast Asia these people have evolved an extra-large spleen serving as a repository of oxygen-rich blood cells thanks to that they can easily spend 5 to 10 minutes fishing underwater without coming up for air even once now about 14% of the population don't have a palaris longus muscle a it's actually a rudimentary part of the body and the need for it disappeared in the process of evolution so if you don't have this muscle worry not its absence doesn't affect the work of your forearm anyway about 5 to 37% of people don't have wisdom teeth from birth these teeth are not really needed anymore they were important for our ancestors since they help to chew hard food like nuts roots and meat and saltwater taffy N I made that up but since most of the food we eat today is processed wisdom teeth are now a mere atavism most people have just one clockwise hair whirl but five out of 100 people have a double crown and if both worlds are directed counterclockwise this makes a person even more unique some scientists think there's a genetic link between Hair World Direction and handedness a bit more than 8% of right-handed people have counterclockwise hair whs but in the left-handed this number grows up to 45% a man's brain gets older faster than a woman's as men age they start complaining about memory problems and lack of concentration more and more often at the same time women don't have such acute problems s with memory but they feel depressed more often H which one would you choose now when someone is lying their own nose gives them away psychologists from the University of Granada have discovered that when a person tells a lie the temperature around their nose and in the inner corners of their eyes goes up this phenomenon got the name of wait for it the Pinocchio effect Japanese people have particular bacteria in their intestines these bacteria help them to digest Sushi the Japanese have been eating raw seaweed for centuries microorganisms dwelling on the surface of the seaweed got into their bodies and actively developed nowadays the bacteria helped Japanese people digest raw food and prevent different problems connected with food so people have as many hairs on their bodies as chimpanzees the hair count of a person and a chimp is approximately the same the only difference is that human body hair is mostly useless and so fine that it's almost impossible to see humans don't have more genes than other species in fact people have fewer genes than a worm Tomatoes also have many more genes than you do but we are such complicated creatures well recently scientists have concluded that the number of genes that a genome contains isn't closely connected with the complexity of a living being let's take a breather speaking of which your left lung consists of two loaves while your right lung is divided into three Parts Plus the lung on the left is a bit smaller since it has to make room for your heart your lungs also contain around 1,500 M of Airways it's more than half the distance between New York and Los Angeles there are also more than 300 million Alvi which are tiny balloon-shaped air sacks in your lungs people have five most obvious senses Vision smell touch hearing and taste but that's not all how about ther otion the sense of Heat or ntion the perception of pain or your body awareness proprioception to figure out what it is close your eyes and touch your nose got it that's proprioception in action this list can be much longer some expert State people have from 21 to 53 senses so your fingers get all wrinkly after you spend too much time in the water pruny fingers are caused by the narrowing of your blood vessels when you stay in the water for a long time your nervous system makes your blood vessel shrink your body sends the blood away from that area and this loss of blood makes your vessels thinner the skin starts folding over them forming those funny wrinkles scientists think this process helps us have a better grip when our hands and feet are wet there are three kinds of cone cells in the average person's eyes these cones help to recognize the colors in the blue red and green spectrums thanks to them most people can distinguish around 1 million different shades but those with tetrachromacy have four cones in their eyes this feature allows them to see up to 100 million different Hues this Vision anomaly is extremely rare and is much more common in women than in men interestingly most people with tetrachromacy don't even realize they see the world brighter than others now not all people have round pupils two people out of every 10,000 have unusually shaped pupils most commonly they resemble keyholes this eye disorder is called Coba interestingly some people with this condition don't have any problems with their Vision only 3 to 22% of people in the world have Morton's toe it's a foot structure where the second toe is longer than the first one Michaelangelo's David and the Statue of Liberty both have this unusual body feature hey toes up in some people saliva accumulates in a gland under their tongue it can then get propelled out in a stream when a person presses on this gland if the mouth is open at the moment a jet can reach several feet this process called gleeking can occur spontaneously a person accidentally pushes their tongue against the gland while eating yawning talking or cleaning their teeth and voila up to 35% of people can Glee but just 1% can do it on command I had a friend in college who did that yeah it was weird about 18 to 35% of people have an interesting reaction to sunlight they sneeze this phenomenon has its own name the photic sneeze reflex in the Greek language it's called Sun sneezing but you just like salamanders regrow their tails humans might be able to regenerate cartilage that's the rubberlike stuff around your joints recently scientists have discovered that cartilage might be able to repair itself most effectively at the ankle not that well in the knee and least effectively in the hip the the human brain is 73% water just like your heart that's why if your brain loses even 2% of liquid you start feeling exhausted this also makes your memory get worse shortens your attention span and puts a damper on your mood so drink up your brain is constantly processing tons of visual information around 600 million bits per minute it all starts when the light goes through the cornea your eyes clear protective outer layer then the light turns into a electrical signals they travel to your brain and it interprets them into the images you see it takes milliseconds for this complicated process to happen people who live to be 110 years and older called supercentenarians may have a secret researchers have discovered that their immune cells called te- helpers might change and adapt to the late stages of Aging these cells are likely to protect them from viruses and other health problems we've become impressive impressive multitaskers thank to technology or rather it only seems so the human brain can't concentrate on two things at once what it can do is to switch between several tasks really fast but it makes your attention span shorter and harms your shortterm memory and the ability to learn so put that phone down so when a woman is pregnant her brain goes through many changes that prepare for childbirth and the part of her brain that's responsible for social signals decreases this causes the brain to be more efficient at taking care of the baby but don't worry it doesn't stay that way it returns to its standard size after the pregnancy in a day your body produces two pints of saliva that's around 80 gallons a year and in one lifetime yes you can fill two Olympic pools with spit imagine swimming in what you that's disturbing and disgusting at the same time humans have one secret superpower hidden in our stomachs our stomach acid it has a pH of around one and it is one of the most acidic substances in the world it's so powerful that it can dissolve metals and the stomach must develop special protective mucus to prevent your whole body from dissolving but don't try to eat metals they can be toxic if you take a big breath your left lung will be filled with much less air than your right one because it's smaller your heart takes up quite a bit of space so the left lung has to make room for it the lungs are divided into loaves the right has three and the left lung has only two loaves your lungs aren't the only organs that are not proportional in size your kidneys are also a bit different the left one is typically a bit larger than the right one if you've ever wondered how big they are your kidneys are the size of your fist everyone knows that sharks have strong teeth but the outer layer of our teeth called enamel is as strong as the one covering shark's teeth the enamel is also the strongest substance in the body it protects our teeth from all kinds of damage so you can eat your favorite food in peace like pizza now toenails grow twice as slowly as fingernails or at half speed whichever one you like and if there was an Olympic sport determining which nail grows the fastest well your pinky nail would always come in last because it is the slowest growing nail out of them all the reason for this is that some fingers aren't used as much as others and don't have as much blood supply there are weird animals like shrimp and crabs that drop their skeletons in order to grow don't be shocked to learn that we do the same thing now we don't literally drop our skeleton of course but we slowly regenerate a new one every 10 years so in our whole life we will change our skeleton around eight times many years ago we were reptiles like the evil lizard from Spider-Man luckily we've evolved and lost almost all of our reptile features except the third vestigial eyelid which is partially visible at the end of your eye close to your nose reptiles still have this it is used to protect and clean the eye if you have polycoria your eye can develop more than one puple sadly this won't improve your vision it can make it worse in fact but in most cases it won't affect your vision much this conition is super rare and typically starts in childhood but it can also develop later in life dermatographia is a usually harmless condition that allows you to virtually write on your skin people who have this condition don't need notebooks to keep notes if you have this condition and you scratch your skin lightly the redness can last for half an hour this might be helpful at your next exam if you know what I mean another unique condition that some people have is syndactyly or webbed toes this is when your toes are fused together nobody knows what causes this but it's nothing serious did you know that your tongue is as unique as your fingerprints yeah mean neither the tongue has special shapes and geometric figures like fingerprints that differ from person to person who knows maybe we'll unlock our phones by licking them in the future or not a fully grown person is made up of around seven octillion atoms it sounds unreal but it's true that number is so big that I can't even say it in one breath it's 7 followed by 27 zos now ear wax looks like Wax feels like Wax and tastes like of course I have no idea what it tastes like and please don't try to find out my point is it's not actually wax It's a combination of fat skin cells dirt and sweat it's important for the health of the ears because it helps keep them clean now pound for pound bones are much stronger than steel the same density of bone will almost always outperform steel but if you compare the same volume of bone and steel the bone will break before the steel does bones are made to be light and strong if they were made of steel we'd be a lot heavier and would need much more energy to move when you were born you had more bones than you do now because most of them have fused together an adult person has 206 bones while babies have 300 bones some of those bones are made of cartilage which is flexible and soft the strongest heaviest and longest bone is the femur this bone is the most difficult to break it can take up to 30 times your body weight or around 6,000 lb technically you could balance two cars on your femur and still be fine but don't try it bioluminescence is a talent some animals have like angelfish fireflies lantern fish and humans yep you actually shine in the dark scientists have discovered that we glow but the shine is 1,000 times weaker than what our eyes can detect you can see yourself glow if you have an ultra sensitive camera the amount of melanin you have in your eyes determines what color they are brown eyes have the largest amount of melanin and blue eyes have much less of it however people with heterochromia have different color eyes one eye can be blue and the other can be brown or any other color which is cool sometimes only half the eye can be a different color now when you sneeze the air exiting your nose and mouth can travel at almost 100 mph we sneeze because some irritant enter the nose and the body sneezes to remove it and if you've never heard about your eyes falling out if you sneeze without closing that's a lot nothing will happen your heart is the only muscle that works 24 hours 7 days a week it beats over 3 billion times in a person's life and pumps around 2,500 gallons of vital fluid daily so you should take good care of it because it works super hard and you can't do without it your funny bone isn't actually a bone but a nerve that's why when you hit it you get the feeling that a thousand ants are crawling under your skin this nerve is quite long it starts in the spine and ends in your pinky and ring fingers almost all of us have heard that our noses and ears never stop growing well this is not really true our noses and ears stop growing when we become teenagers but they do get bigger as we age because gravity is pulling them so they're actually stretching not growing when you don't get enough sleep the brain can literally start eating itself 133% of neurons are destroyed when when you don't get a good night's sleep that's a lot of brain power to lose instead of finishing that episode of your favorite series go to bed it's not worth it when you are well rested and have enough sleep your brain can create enough electricity to power a light bulb and your neurons can send more messages than all the phones in the world combined they travel at around 150 mph and the signals carried by your motor neurons can travel twice as fast unlike our primate Pals many people still have these foot arches they help us move this Arch is like a built-in shock absorber for your feet it's what allows us to bounce there's another one it's called the transverse Arch running side to side on the top of your foot think of it like a bridge that helps keep your foot in shape research says this Arch is a big deal too it's responsible for about 40% of your foot's stiffness simply put foot it's like the scaffolding that holds your foot together when scientists snipped the transverse Arch the foot lost a lot of its firmness but when they cut the bottom Arch it wasn't that dramatic so is it a modern human thing nope these arches didn't just pop up yesterday the transverse Arch has been around for 3 million years the bottom Arch showed up about 1.8 million years ago we might as well continue with another element of our feet before moving up to other parts our pinky toes are also more important than they seem whether you were born without one or have lost it you can still walk but pinky ones are important for keeping us on our feet they provide balance inside your foot you've got 26 bones that team up to make sure you don't topple over small toe is a part of this balance work our ape ancestors needed their toes to grab claw and swing from trees today we've traded our tree climbing skills for comfy couches and binge watches okay let's move up a bit and talk about the appendix you might think that it's useless but nope when a human is in their mommy's belly this organ starts to do its job around the 11th week of development it starts churning out special cells that produce helpful hormones and compounds the appendix helps train our immune systems troops ensuring they're top-notch Defenders it also o collects all sorts of foreign substances AKA antigens from our digestive tract yet as diets evolved this piece shrank like a deflating balloon unlike most other vestigial structures the appendix isn't always harmless it can turn into an angry little Fireball by the way vestigal organs are the ones that have lost their primary ancestral function these structures mostly lack an apparent purpose another famous vestigal example is wisdom teeth those are pointless and have been causing us trouble for ages yet nearly 95% of us have them and 90% might even have to deal with the drama of an impacted wisdom tooth at some point if you don't have them you might consider yourself lucky here's an additional interesting fact about wisdom teeth even though your teeth have a mineral softer than what's in shark teeth new tests show that they're just as resilient the coating on shark teeth is actually similar in hardness to the enamel on a human wisdom tooth it's because their surfaces are made of mineral crystals held together by proteins these prevent them from shattering easily upon impact so the difference in how we and sharks use our teeth comes down to their design not their toughness anthropologists have examined ancient skeletons they think our ancestors needed these extra teeth to chew tough stuff like roots and raw meat e back then those extra teeth came in handy but then we discovered cooking and suddenly our food got softer and our Jaws got smaller geneticists have their own take on this subject it involves a gene called mh16 which seems to play a role in both brain size and jaw characteristics yet the exact part it played in our evolutionary story is still a bit of a mystery now another pointless thing is the eyelid well not the regular eyelid you know that little pink thing hiding in the corner of your eye birds and some other furry Pals use it to fend off dust and debris trying to mess with their eyes but in US humans it's mostly vestigal meet the palis longus about 85% of us still carry it around maybe you also have it you can test it by putting your hand on a flat surface and making your pinky and thumb meet if you spot a little tendon band doing the limbo in the middle of your wrist then you found it it was there for gripping stuff and swinging around like Tarzan we can carry on with the grasping trick even before you're born around 16 weeks into your time inside your mom's tummy you're already practicing your grip you start by grabbing onto the umbilical cord when you finally arrive in the world this reflex helps you hold on to things fun fact small monkeys can hang on one hand for ages thanks to a similar trick yet we humans lose this super grip when we're around 3 months old when you're still in your mother's womb you also have a mini tail but as you grow it disappears and those tiny vertebrae become your tailbone or coxics humans and our ape cousins don't have tails like other animals our ears too have vestigial muscles they help animals hear better and express their feelings but in humans these ear muscles don't do much we figured out other ways to listen and show our emotions yet some of us can still wiggle our ears with practice surprisingly toenails also count as a vestigial thing I mean they function as the initial line of defense they protect the body against harmful microorganisms in our evolutionary Journey we used our fingernails and toenails for defense digging and climbing in the modern world fingernails still come to our rescue whether it's for peeling fruit or that Sweet Sensation of scratching and itch yet toenails have retired but hey we can apply nail polish to them for fashion sake they certainly work for many people it's not just humans who have useless limbs or organs in 179 98 an anatomist examined A peculiar bird incapable of flying he documented his observations this Aven species was none other than an ostrich ostriches and ceries are just a few examples of birds possessing vestigial Wings anatomically speaking these are rudimentary Wings incapable of granting flight to these Hefty creatures yet they aren't entirely devoid of function they serve the purpose of Main maintaining balance during rapid running plus they elaborate courtship displays helping Birds attract potential mates now when it comes to animals a lot of them glow too around 76% of ocean animals including jellyfish worms sharks and sea stars are bioluminescent they have a compound called luciferin that reacts with oxygen to create light and for them it serves such purposes as stunning Predators attracting prey or warning others of danger we humans can glow too unfortunately this glow is super faint our eyes can't see it our bodies emit light but it's about a thousand times dimmer than what our eyes can detect scientists found that our glow changes throughout the day it's the faintest in the morning and the brightest in the late afternoon our faces glow more than the rest of our bodies they think it's because our faces get more sun exposure and have melanin which has components that can boost light production some body tricks distinguish us from the rest of the animal kingdom for instance do you know that humans are the only animals capable of blushing it seems we've got the exclusive rights to this Rosy cheek phenomenon when we find ourselves in an embarrassing situation our blood vessels dilate that's what gives us those blushes embarrassment is a pretty complex emotion it's all about understanding what others think of us this might be too advanced for other animals interestingly F uakari monkeys can also blush but not in the same sense for them this is a show of their good health speaking of good health we should honor our gut your gut includes the stomach liver and more it's often called the second brain this second brain has its own nervous system it has 100 million Messengers they send info to the rest of your body even if the gut brain connection is cut it keeps working it ensures your digestive system functions on its own the human body is this perfectly balanc machine right well not when I'm using it normally all its parts work seamlessly together to keep us thriving and well alive each of our organs is essential for our day-to-day activities from breathing walking talking and coming up with bright ideas that push Humanity forward but are they really essential do we really need all those body parts or are some of them just ancient relics that we just got stuck with in this weird game of evolution take wisdom teeth for example nah somebody already took mine yeah they're those pairs of teeth stuck in the back of your mouth you often have to go to the dentist for they're also known as third MERS and while they can be used to chew food a lot of people think they're just unnecessary and get this around 22% of people worldwide don't even have all four of them when they do grow in they're the most likely to become impacted which means they get stuck in the jawbones sideways and can't properly come through the gums it's all because our Jaws are often too small to accommodate these extra guys some smart scientists think that's because we've evolved to have smaller Jaws over die recent evidence also shows that what we eat as kids might also be to blame but it's hard to know for sure apparently munching on hardto chew foods like raw veggies and nuts can actually stimulate jaw growth while eating soft processed foods can kind of stunt it and that leaves little space for our back teeth to come in and you know do their thing will they disappear all together in the future I guess we human mammals will just have to wait and see now let's talk about the voral nasal organ or as I like to call it the nose's secret instrument you see rodents and other mammals have this awesome ability to communicate with each other using chemical signals called feromon and guess what they have a special organ called the voral nasal organ or vno that helps them detect these pheromones here's where it gets interesting While most adult humans have something resembling a vno in their nose it turns turn out that it's basically a useless Remnant neuroscientists even say that if you look at the anatomy of this organ you won't see any cells that resemble those of similar organs from other mammals also this organ in humans doesn't seem to be communicating with the brain either now it's not all bad news even though the human vno is pretty useless it looks like it still might respond to some pheromones will humans keep this organ on their evolutionary to-do list for now I'd place it in the maybe pile now here's a tail animals that feature Tails need these structures for a lot of things some needed for balance others for navigation while some needed to attract potential Partners but did you know that when we're just a few weeks old in our mother's belly we actually have tails too that's right we have a whole little tail complete with vertebrae as we develop that tail magically disappears and we're left with our trusty tailbone humans and apes are unique in that we don't have tails unlike other primates it's a mystery why Apes lost their tals but we can all agree that it makes us stand out in a crowd however once in a bloom Moon a human is born with a little vestigial Tail cute right well don't get too excited because these Tails don't have vertebrae and can sometimes be associated with a tricky condition of the spine either way these tails are usually harmless and can be easily removed with a quick surgery and let's be honest it's not like we're going to miss it after all who needs a tail when you have arms and legs to get around plus can you imagine trying to find pants that fit with a tail sticking out the back not a good luck there's little to no chance humans will end up needing tails in the future so I'm guessing the tailbones are bye-bye in future Generations humans also have a funny little fold of membrane in the inner corner of the eyes called the pla semi lunaris it's basically what's left of a third eyelid which is still found in some animals like gorillas and other primates but here's the funny thing even our close relatives the chimpanzees have this little fold that appears to be useless too so we're not alone in this eye quirkiness speaking of unusual membranes they serve a variety of functions in different anim animals such as protecting the eyee from dirt and moisture or hiding the iris from predators some species can even see through their transparent membranes when they're underwater or underground now the reasons why we humans lost our third eyelid is still a bit of a mystery maybe changes in our habitat and eye physiology made it unnecessary or maybe we just evolved to be too cool for a third eyelid who knows with or without vestigial organs it's interesting to imagine what humans might look like in the future many organs have become obsolete because of our lifestyle changes care to have a peek into what we might look like in the future and in the same vein or artery have you heard of the concept of text Claw is where you spend so much time typing on your phone or laptop that your hand starts to cramp up like a claw and that's just one of the physical changes that could happen to us if we don't take care of our bodies in this Tech heavy world but it's not just our hands that are affected we could end up with 90° elbows from constantly holding our devices at that angle and even a smaller brain from all the distractions and information overload now I know what you're thinking we just can't give up technology and go back to the Stone Age and you're right we don't have to but we do need to be aware of the potential negative effects and take steps to reduce their damage that's why a team of designers put their creative efforts together to present Mindy a future human whose body has physically changed due to the constant and never-ending use of smartphones laptops and other types of maniacal devices while Mindy's exaggerated changes may not be in our future the concerns behind them are real so what can we do well one suggestion is to take regular breaks from our screens and stretch our legs a little maybe even encourage some office yoga or dance parties to get the blood flowing we don't have to give up technology completely but we do need to be mindful of its effects on our bodies and Minds many years in the future we might even get smaller in size one scientist reckons that if we were smaller our bodies would need less energy which would come in super handy in our increasingly crowded Planet it's funny to think about how different our lives are now compared to when we were hunter gatherers back then we only had to interact with a handful of people each day but now remembering people's names is a super important trait and it might even be something we grow to become better at or technology might actually play a role in our Evolution scientists believe that we could one day have implants in our brains that help us remember people's names it's like having a biological phone book directly in your body wouldn't that be cool who knows maybe in the future we'll even have visible technology as part of our appearance imagine having an artificial eye that can see different colors and visuals and don't even get me started on what we might look like if we colonize Mars with the lower gravity our bodies could change in all sorts of ways we might have longer arms and legs or even insulating body hair like our Neanderthal ancestors it's hard to pinpoint what we might look like in the future without very precise data to back the models up but it's fair to say these changes will be interesting to say the least as for me well it's too late to say the least I've said over, 1400 words here already the human tongue consists of eight intertwined muscles the whole structure resembles an elephant's trong or an octopus tentacle just like them the tongues very flexible and can move in any directions people live to be 1010 years and older also called super centenarians may have a secret researchers have discovered they have more immune cells culty helpers than the average person these cells are likely to protect some people from some health problems scientists have always thought that the human brain is a sterile Place free of germs or bacteria but the latest Studies have shown that experts might have been wrong all along it seems there are harmless microbes living in our brains but researchers need a bit more time to make sure researchers believe that if people suddenly started to be born with six fingers the brain would easily adapt to it those with polyc extra fingers or toes usually don't have any problems with this feature their brains know how to control additional fingers and how to use each of them independently such people sometimes need only one hand to carry out a task for which others would need two hands in some people saliva accumulates in a gland under their tongue it can then get propelled out in a stream when a person presses on this gland if the mouth is open at the moment a jet can reach several feet this process called gaking can occur spontaneously a person accidentally pushes their tongue against the gland while eating yawning talking or cleaning their teeth and voila up to 35% of people can Glick but just 1% can do it on command about 25% of people have an interesting reaction to sunlight I mean sneezing this phenomenon has its own name the photic sneeze reflex in the Greek language it's called Sun sneezing just like salamanders regrow their tails humans might be able to regenerate cartilage that's rubberlike stuff around your joints scientists have discovered that cartilage is likely to repair itself most effectively at the ankle not that well in the knee and least effectively in the hip the older you get the fewer bones you have when people are born they have many more than 206 bones in babies most bones look different than they do in grown-ups and there are more than 300 of them where do those extra ones go they sure do not disappear or dissolve they fuse together as they develop until they merge some bones contain neither collagen nor calcium what we think is standard bone material no they start as flexible a tough cartilage later the cartilage turns into sturdi a bones and some of the Pieces come together for example the skull initially consists of 44 different elements but a grown up skull is made up of 22 bones some bones don't fully form till our early to mid 20s when someone's lying their own nose gives them away psychologists from the University of Granada discovered that when a person T A Lie the temperature around their nose and the inner corners of the eyes went up this phenomenon was called the Pinocchio effect ancient Greeks had stories about fire breathing creatures called chimeras they were a fearsome mixture of a god lion and snake in real life chimeras are people who have two different sets of DNA scientists have recorded no more than 100 cases of human chimerism albanism is a rare feature to have people with albanism have very little to know melanin a substance that produces pigmentation but if it's ocular albanism that's even more unique this kind of albanism affects only a person's eyes experts don't have exact numbers but they think between one person in 20,000 to one person in 50,000 have ocular albanism scientists have figured out that you might be good at hearing things thanks to a teeny Jello violin inside your ear there is a miniature assembly line of nerves tissues fibers and Bones it turns vibrations into sounds and there is also a blob of jelly like substance made up of 97% water researchers believe that thanks to this Jello your ear can separate high frequencies from lower ones your brain is constantly processing tons of visual information around 600 million bits per minute it all starts when the light goes through the cornea your eyes is clear protective outer layer after several transformations the light turns into electrical signals they travel to your brain and it interprets them into images you see it takes millisecs for this super complicated process to happen the human brain is 73% water just like your heart that's why if your brain loses even 2% of liquid you start feeling exhausted this also makes your memory worse shortens your attention span and puts a dampener on your mood around 65 % of the world's population have loop-shaped fingerprints in 30% of people fingerprints are wh shaped and only 5% of people have art- shaped fingerprints all these types are divided into smaller groups for example there might be plain or tented arches accidental whs or the peacock's eye and so on if you have a circular hair whirl on your head it's likely to be clockwise so some scientists think there is a genetic link between Hair World Direction and handedness a bit more than 8% of right-handed people have counterclockwise hair whs but in the left-handed this number grows up to 45% there are more than 650 skeletal muscles in your body they make up around 40% of your body weight up to 85% of the heat your body produces comes from your muscles Contracting at the same same time caterpillars have many more muscles Than People some species up to 4,000 of them and the grasshopper has 900 your brain can decide what sounds to focus on when you're in a loud place thanks to this ability you can shut out all other voices and concentrate on the person you're listening to the Bader is a group of nomadic people that live in the waters around the Philippines Indonesia and Malaysia thanks to a rare DNA mutation they can stand in water for up to 13 minutes the bajour people have evolved spings that are way larger than average this feature provides them with a genetic Advantage see Nomads needed to hunt for fish or look for underwater stuff that can be used in crafts human bones might be loaded with a network of tiny tunnels scientists knew nothing about them until recently that's why it was unclear how blood cells which are produced in our bones could quickly exit bones and get into the blood circulation but now the mystery may be finally solved if there are holes there can also be capillaries miniature blood vessels some people have more than one row of eyelashes this phenomenon is a genetic mutation called diasis a person with this condition has a second set of eyelashes growing behind the first all these thick Lush lashes sure look beautiful beautiful but they can also cause some discomfort some hairs can start growing in the wrong direction or in the place where an oil gland is supposed to be it can cause irritation and tearing why do you fingernails turn blue when you get cold for one thing your fingers are rather far away from the rest of your body just like your toes or the very tip of your nose imagine a piece of tissue in the middle of your body it gets circulation from all sides left and right up and down but the ends of your fingers have just one option blood can only flow from the hand down the fingers when it's cold little blood vessel AKA capillaries in your fingers narrow it prevents blood from flowing as freely as before when blood circulation slows down the tips of your fingers and your fingernails don't get enough oxygen rich blood and the less oxygen your blood contains the darker it becomes it's color is actually dark red but we perceive it as blue the hippocampus is a part of your brain that helps you navigate in space you have two of them each the size of a chestnut London C drivers have bigger Hippa campai than most other people researchers assure it's thanks to their regular mental workout it's not a gimi to navigate 60,000 London streets now I've tried this one myself too pinch your elbow at as hard as you can you barely feel pain how come well different areas of your skin have different nerve endings our bodies are designed to be more sensitive to pain in places that are at higher risk of getting damaged those important parts have more nerve endings so that we're more alert and able to protect ourselves and thick skin like that on elbows has fewer pain detectors now I'm not talking about the tingling jolting pain you can feel when you hit your elbow against something W that feels almost like your entire arm has been electrocuted it's not a feeling I would consider funny but it comes from the funny bone now the funny bone isn't actually a bone it's a nerve that starts in your spine goes through your neck through your elbow and through your fingers its real name is the Anar nerve it's one of the three primary nerves in your arm and it provides sensation to the fingertips your onar nerve is well protected by muscle fat and Bone but there's one spot at your elbow where this nerve is exposed and that spot is yeah the funny ball a different but real version of Achilles story huh okay so now you know why it hits so different when you bump your funny bone and why you feel nothing when you pinch your elbow now the next phenomenon is related to socially awkward moments okay maybe not entirely it might happen when your crush gives you a compliment I'm talking about blushing now I'm not sure those butterflies in your stomach exist when you're in love but I'm sure of this when you blush your stomach lining also turns red yeah I've looked the stomach lining is the tissue that protects your stomach walls from the acid inside when you blush it also turns red because blushing happens when the blood Rises to the surface of the skin this affects the stomach too now this is a natural process a physiological response to the change in your emotions now since we're talking about the stomach it might be a good time to mention that the stomach fluid has the ability to melt a steel table Yep this means the acid would be able to digest your internal organs luckily the stomach lining prevents this from happening number three is about letting you know that you can glow in the dark now don't turn off the lights just yet you can't see it with the uned eye these visuals of glittering human bodies come from Ultra sensitive cameras Japanese scientists were the first to capture the image of human bioluminescence only ultrasensitive cameras can reveal that our bodies emit tiny amounts of light because this light is a thousand times weaker than the human eye can detect apparently all living creatures produce a small amount of light thanks to the chemical reactions in their cells humans are newly added to this list the researchers had been photographing the upper bodies of the volunteers for several days the results showed that the amount of emitted light followed a 24 hour cycle the glow is at its highest in late afternoon and lowest late at night plus the brightest light is emitted from the cheeks forehead and neck interestingly this does not correspond with the brightest areas caught by thermal cameras did you know you're a little bit taller in the morning than you are later at night yes I've been measuring you seriously this height difference is related to gravity its Force compresses the cartilage in your spine and knees when you stand up or sit down throughout the day but when you're lying down your spine decompresses and relaxes that's why when you wake up in the morning after resting in bed all night you're taller the increase in height is not even above an inch so don't bet on who is taller after hearing this information fun fact astronauts returning from a mission are a few inches taller than they usually are on earth it's because of the lack of gravity on the International Space Station they don't remain that tall forever though when they're on the Earth again gravity gradually squeezes them back down to their usual height now let's get back to the organ we've already spoken about the skin yes the skin is an organ in fact it's the largest organ in your body it contributes to about 15% of your body weight what else does this organ do besides covering your body it performs vital functions for instance it protects your body from external physical and biological harm plus it prevents excessive water loss now I can't help wondering what other surprises the human body has in store for us but right now let's move on to the Animal Planet owls don't have eyeballs instead they have something called eye tubes their rod-shaped eyes do not move in their sockets as our eyeballs do that's why owls would have to move their entire bodies to look around but moving their torsos would make some noise and other animals would hear it so owls have evolved to have necks that can twist to around 270° and they move super silently but why the concern well night vision requires large corneas to get as much light as possible this is the main reason why most nocturnal animals such as the slow loris or tarer have big eyes for owls it works a little differently since they have small heads such large eyes wouldn't be able to fit inside now even though these creatures don't have eyeballs they have three sets of eyelids once set is for blinking one is for sleeping and the last one is for keeping their eye tubes clean so do the owls give a hoot about that yes yes they do moving on from nocturnal animals to the ones you're more familiar with meow cats have an extra organ that allows them to taste scents in the air this organ is called Jacobson's organ or the vomel nasal organ Jacobson's organ is located inside the cat's nasal cavity and opens into the roof of the mouth this organ can detect specific chemicals by using nerves that lead directly to the brain that's not a regular sniffing though the odor receptors of Jacobson's organ aren't designed to catch ordinary smells they detect chemicals that have no odor at all in other words cats can detect undetectable smells it's not just this Jacobson's organ increases the sense of smell for instance when kittens need to find their mother's milk imagine there are two mother cats and four kittens kittens can distinguish their mother from the other grown-up cat with the help of their sense of smell now when two people meet they assess each other's body language cats can usually do this by sniffing each other's Heads This greeting releases pheromones that can tell a lot about one cat to the other like what the other feline likes to eat or if they are healthy or not they can even evaluate whether the other cat is happy or Moody all thanks to Jacobson's organ now another fact about cats their nose has distinct ridges that look like a pattern similar to our fingerprints every cat has a unique nose print it can be used as a form of identification okay cat we can nail you for breaking the vase we have your nose prints all over it now do you want to cut a deal just tell us what you know about the dog and that chewed up DVD dog lovers no I didn't forget about you here's a myth you've probably heard dogs are color blonde but they aren't however it is true that that the color range they can detect is limited compared to the spectrum humans can see their color palette consists mostly of yellows blues and violets our Reds greens and oranges are not noticeable to them now this one is about turtles these animals cannot leave their shells and get back whenever they want in fact they are completely attached to their shells these shells grow with turtles similar to the human skin a turtle shell consists of 50 bones it also includes a skeleton with the spine and rib cage so they go on vacation with it it's kind of like an RV that you can't get rid of hey can you speak up I just ate an entire pizza that's because after eating a hearty meal our hearing tends to be a bit less sharp during digestion most of our bloodstream is directed toward the stomach which takes away a bit from all the other organs so next time you want to go listen to your favorite band at a live concert make sure to eat a lighter me to keep your ears Pitch Perfect on top of our stomach and left kidney we have a magical organ that can grow back if we remove a part of it our liver can regenerate Itself by making new cells called hepto sites they begin to multiply once the liver is damaged the seriousness of that damage defines if it can regenerate completely and the amount of time it takes to do so ever wondered what's worse for your body no sleep or no food turns out the lack of sleep is more dangerous that's because if you don't rest your body becomes exposed to a lot more risks after 24 hours without any shut eye you can start to have memory problems and find it difficult to concentrate at just 17 hours without sleep you start to feel tired and groggy irritable tense and more emotional I need a nap your pain receptors also become more sensitive which means everything hurts hurts a bit more than it should oh and it also affects your hearing too what on the other hand you can be well into your 24-hour period with no food before your body realizes you've stopped eating in the first 8 hours you just keep digesting the last meals you had after those first hours you start to use stored fats for energy not eating for more than 24 hours means that your body will start eating away at its own protein which means you literally start to lose muscle rainwater isn't always safe to drink it can sometimes hold harmful bacteria in viruses also in heavily polluted locations it may even meet other harmful materials some communities out there do depend solely on rainwater as their primary source of hydration but does rainwater have any other health benefits not really according to current studies some of those risky substances may be removed from Rainwater water if you boil it but it's best to stick to the safer side and only drink water from sources that are 100% safe for human consumption now we produce sweat mostly to regulate our body temperature and for some added moisture like the one we need in the palms of our hands for a better grip but sweat doesn't just show up on our skin it comes out of around 5 million pores on our bodies we're literally stepping on a quarter of our bones each day with we have just over 200 bones in our body but about a quarter of those are in a very small surprising area our feet since we have 26 bones in each foot we end up with literally 52 in both now our eyes produce tears for many reasons like protecting themselves from infection or clearing up debris such as smoke and dust or when your baby done you wrong but the number of tiers we produce is quite surprising up to 30 gallons per year that's almost enough to fill a bathtub wow that is heartbreaking our blood pressure wakes up hours before we do that's because in the morning the body produces a bunch of hormones like adrenaline and neur adrenaline they help give us the energy boost we need during our morning hours but they also increase our blood pressure which is usually higher between 6:00 a.m. and noon during the night since we should technically sleep and perform no physical activity our blood pressure drops down by up to 20% speaking of our Vital fluid our blood accounts for about 10% of our total body weight we tend to think of our body weight as being mostly made up of muscles fat stores and bones but there's a lot more to it in a fit adult person bones make up 15% of the total body weight about 40 to 45% is left to muscles about 15% to fat deposits and the rest are stuff like skin tendons hair hair and other yucky things let's see that adds up to yep 100% your lungs aren't twins they're siblings that's because they aren't the same size or shape your right lung is bigger and tends to weigh more and your heart is to blame for it since your ticker tilts to the left a little bit this creates a small indentation in the left lung called the cardiac impression which is also what funny heart doctors do at comedy clubs the right long may be bigger but it's a bit shorter since it needs to make room for the liver doesn't your house have a liver room many of your body measurements are quite symmetrical in surprising ways if you were to stretch out both of your arms your wingspan and measure it it should show how tall you are based on these similar measurements Specialists can even produce theories about what ancient humans used to look like looks like we've evolved to be increasingly symmetrical to appear more attractive and healthier to attract mates H more so since we've evolved to also walk on two legs our symmetrical features help us to move around with the least amount of energy because it creates balance now humans aren't natural Champions when it comes to the scent of smell that's for sure but our noses can pick up about 1 trillion different scents scientists are still performing research on this subject and believe the number may be even higher some dog breeds may be able to notice sense somewhere between 10,000 and 100,000 times better than we do but turns out the best nose in the animal kingdom may be attributed to the elephant because of its staggering number and type of O Factory receptor genes over 10,000 while humans and chimpanzees have less than 400 we tend to look at our pinkies as our most delicate fingers but we do have more power in them than than we think turns out that should our pinky finger be lost or affected the overall strength of our grip May decrease by up to 33% the liquid in our stomach made of hydrochloric acid pottassium chloride and sodium chloride is way more powerful than any acidic food you can think of like lemons pineapples or tomatoes the pH of healthy stomach acid should be between 1 and three so if you think about it it's just below that of battery acid our hair strands are strong too so strong that research is performed on them to duplicate their resistance into human-made materials a healthy head of hair should be able to withstand up to 26,000 lb it's due to a little protein in the hair strand called keratin which you can also find in your nails and skin now only about onethird of us humans have perfect vision there are a lot more glass and contacts out there than you'd think making up about 66% apart from different eye conditions our vision also gets worse with age when we're born our heads amount to one qu of our total length by the time we reach 25 our head will only be 1/8 of it that's because our heads won't change their size a lot as we grow older as opposed to the rest of our body mostly when it comes to the legs and torso our brains are these super powerful computers and a single human brain cell can hold five times as much information as the entire encyclopedia britanica maybe you remember that we've yet to pinpoint the exact amount of data it can support but in electronic terms the storage capacity of the brain is around 2,500 terabytes for comparison the National Archives of Britain which keeps over 900 years of History only takes up 70 terabytes it's it's probably the reason our brains need the most amount of oxygen compared to other organs about 20% of the total oxygen that enters the bloodstream and that's despite the fact that it makes up only 2% of our body mass our normal activities plus the effect of gravity make the cartilage in our ankles knees hips back and neck slowly compress once you rest overnight the cartilage goes back to normal on average you are somewhere around 4 in taller in the morning than you are later at night and that's why they call me [Music] stretch you have as much hair as a monkey now I don't mean to be insulting but your fingerprints are not unique you can hear better after you cover your ears now can these statements be true or are they nothing but myths when a person is lying their own nose can give them away can it be true yep researchers from the University of Granada have discovered that when a person tells a lie the temperature around their nose and in the inner corners of their eyes Rises this phenomenon got named the Pinocchio effect hey how about this one people can have as many hairs on their body as chimpanzees can you believe this [Music] surprisingly this one's true too the hair count of a person and a chimp or any other ape of our size is approximately the same the only difference is that human body hair is quite fine and often colorless this makes it hard to see the sheer number of hairs your lungs are identical it sounds reasonable but is it true well it's nothing but a myth your left lung consists of two loes while your right lung is divided into three Parts Plus the lung on the left is a bit smaller it has to to make room for your heart by the way your lungs also contain around 1,500 M of Airways it's more than half the distance between New York and Los Angeles there are also more than 300 million Alvi tiny balloon-shaped air sacks in your lungs I bet you've heard this one before carrots can make your eyesight better true or myth unfortunately this idea isn't true neither can carrots get you better nighttime vision carrots are indeed packed with vitamin A it benefits your body and protects your eyes but even these veggies can't save you from wearing glasses if you need them some people sneeze when looking at the sun now do [Music] they yes that's true about 25% of people have an interesting reaction to sunlight they sneeze this phenomenon even has its own name the photic sneeze reflex oo shaving body hair makes it grow darker and thicker is it the truth [Music] don't worry that's just a myth it might look as if your body hair has changed in thickness rate of growth or even color after getting shaved but it's just an illusion shaving makes the tips of hair follicles blunt that's why they look rougher and darker than usual but once your hair grows in again it'll start to look the same as it did before you shaved it you have unique fingerprints ah this one must be true right [Music] the problem with this statement is that scientists can't prove that each set of fingerprints is absolutely unique it does seem to people but it's impossible to check and while this is improbable people with identical fingerprints can actually turn out to be real people have more than five senses is it an appealing myth or reality [Music] there are five most obvious senses Vision smell touch hearing and taste but how about thermoception the sense of heat nociception the perception of pain or the perception of your body awareness proprioception close your eyes and touch your nose got it that's proprioception and action this list can be much longer some experts State people have from 21 to 53 senses your fingers actually get pruny after you spend too much time in the water for your safety is it true what your back scientists believe so but first things first pruny fingers are caused by narrowing blood vessels when you stay in the water for a long time your nervous system makes your blood vessel shrink your body send the blood away from that area and this loss of blood makes your vessels thinner the skin starts folding over them forming those funny wrinkles scientists aren't 100% sure but they think this process occurs to help you have a better grip when your hands and feet are wet people only use 10% of their brains oh how I wish it was just a [Music] myth and it is apparently you use Almost 100% of your brain every day this organ is active all the time even when when you're asleep when you're snoozing your frontal cortex which is responsible for higher level thinking and the areas that help you sense your surrounding are still doing their job for some people the world is much brighter than for others H how come that's actually true there are three kinds of cone cells in the average person's eyes these cones help to recognize the colors in the blue red and green spectrums thanks to them most people can distinguish around 1 million different shades but those with techn chromy have four cones in their eyes this feature allows them to see up to 100 million different Hues this Vision anomaly is extremely rare and women have it more often than men but do you know the funniest thing about this most people with tetrachromacy don't even realize they see the world brighter than others sometimes you can hear better after closing your ears well it seems counterproductive but can it be true indeed if you're in a loud place for example in a club or at a concert you should close your ears to hear your friends better push the tragus which is the pointy skin covered cartilage in front of your ear canal into your ear then turn this ear toward your friend voila you can prevent yourself from sneezing oh that would be very convenient but maybe it's just a [Music] MTH it's true if you don't want to sneeze press the skin on the bridge of your nose with your fingers when you do it your brain receives an alarm signal it immediately puts the brakes on all other processes including the sneezing reflex okay you're going to finish these five episodes of your favorite series now and catch up on sleep later but can you unfortunately no you can try to catch up on sleep at the weekend or take lots of afternoon naps during the week but it won't help your body doesn't work this way if you didn't have enough sleep the night before or went to bed really late sleeping until noon won't save the day even worse too much sleep will make you feel groggy some people have more ribs than others is it a myth nah it's true most people have 12 pairs of ribs which makes 24 in total but one in 200 people has an additional 25th rib it's called cervical and forms at the base of the neck above the collar bone it can grow on the left right or even both sides of the body those people who have extra ribs most likely know nothing about this modification that's because an extra rib rarely forms completely and can look like a thin strand of tissue in this case you won't see it even on an X-ray you should wait for at least a half an hour after eating before you go swimming well it sounds reasonable but is it [Music] true Ah that's just a myth the general idea behind this claim is that eating a large meal makes your blood flow towards your stomach to help with the digestion process at the same time your muscles don't get enough blood which leads to cramps but in reality swimming right after having eaten something isn't dangerous at all your blood doesn't get diverted enough for it to cause any serious problems some people snores can get louder than a working kitchen appliance what do you think about this well on average when a person snores the sound doesn't get louder than 60 DB which is as loud as a regular conversation but sometimes the noise level can reach 80 DB and that's as loud as a working food blender not all people have round pupils can it be true [Music] yep two people out of every 10,000 have an unusually shaped pupil most commonly it resembles a keyhole this eye disorder is called coloboma interestingly some people with this condition don't have any problems with their [Music] Vision you may have this rare body feature already and not know about it since sometimes even an x-ray can't spot it most of us have 12 pairs of rib bones which means we were born with 24 ribs there are some folks though that actually have 25 ribs only one in 200 people have this rare extra feature and it's called a cervical rib It generally appears above the first rib right at the base of the neck and above the collar bone it's nothing to worry about though most of the time they're unnoticeable and if ever painful they can be safely removed do you know how huskys can sometimes have their eyes in different colors some people come equipped with this rare feature too the medical term for it is heterochromia the name comes from the ancient Greek word heteros which translates to different and chroma which means color people with this condition can either have complete Central or partial heterochromia the complete type means that the person has two completely different colored eyes say one brown and one green two different colors in the same eye are what Specialists call central heterochromia a person with a partial heterochromia has just a portion of their eye of a different color you can either be born with this condition or get it say after an injury still it's extremely rare less than 200,000 people are diagnosed with it in the US either way let's face it it does look pretty cool speaking of eye color want to try guessing what the rarest one is I'll spare you the Google search it's gray blue eyes may have been your first thought and they are indeed already pretty rare only around 8 to 177% of the world's population have this eye color when it comes to gray eyes though they're even more special less than 1% of people have them this rare body feature is caused by a lower level of melanin in the eyes layers if you're interested in meeting someone with gray eyes your best chance is in Eastern and Northern Europe even rarer eye colors are red or Violet but these can sometimes be the result of different health conditions there are people out there who have the superpower of seeing 100 million different colors without the help of any fancy gadgets we see colors thanks to some cells in our eyes named cones most of us have three types of cones to help translate what we see into the colors that our brain is able to understand however Specialists think that there's a small group of people called tetrachromats who have four types of these cones so far researchers have only been able to identify women with this condition that little teardrop shaped ball hanging in the back of your neck you know the one that helps with swallowing your food is called a uula the name comes from Latin and translates to little grape surprisingly enough around 2% of people are born with a bifid uula which means that this indispens ible organ in them is either split or forked you sure can surprise others with this cool feature of yours at parties joking aside though people with this bifid uula may sometimes have trouble eating drinking and speaking they might also have issues with digesting food their speech may also sound a bit unusual but this depends on how much the uula is split this particular body feature might not be the perfect trait when going on vacation but it does allow people to do more with less sleep they say that famous people like Nicola Tesla Margaret Thatcher and Winston Churchill had this super rare feature this Gene called the dec2 gene helps with regulating our circadian rhythms those are the natural biological clocks that let us know when we should be sleeping or eating by making us sleepy or hungry a person with this rare mutation can basically go through a normal sleep cycle in less time they can feel rested even if they slept for only 4 to 5 hours that's one superpower I definitely want to have how about a gene mutation that gives you superhero like bones they're basically unbreakable it also makes your skin less prone to aging Yep looks like with this feature you can walk away from accidents unharmed and even withstand the flow of time some other people out there come with a very attractive feature but it can go unnoticed at least at first glance they have a little something called distichiasis which basically means an extra row of eyelashes just in case you're wondering about the medical aspects too it results from a genetic mutation of a certain Gene as beautiful as it may sound people with that extra eyelash layer can experience some pretty unpleasant Sensations in their eyes and in some cases even have problems with their Vision if spun glass hair doesn't ring a bell know that it is in in fact a condition you might have I know it's pretty self-explanatory but just FYI it causes frizzy and dry hair it's basically so unmanageable that you literally can't comb it it also tends to grow out from the scalp in all directions as for coloring it comes in either bright blonde or silver most of us have hair strands that are cylindrical people with this condition have triangular or heart-shaped strands or even flat altogether it's extremely rare with only 100 confirmed cases but it does become more manageable with age most of us humans have evolved to have some specific traits depending on the area of the globe that we live in but there is a group of people specifically those that live in higher altitudes that developed some pretty cool traits let me explain high altitude environments come with less oxygen not only do these people survive in these locations but they've adapted to actually Thrive out there for example those living in the Andes Mountains of South America have red blood cells that can carry much more oxygen it makes their overall circulatory system a lot more efficient people living in similar conditions in other parts of the world have also adapted in their own way they're able to take more breaths so that they can properly Supply their bodies with oxygen this one is very important when it comes to looks but mean means little in terms of a person's overall health I'm talking about pbism those who have it lack melanocytes those cells that produce hair pigment in some parts of their hair it's most common above the forehead in front of their hairline but it can also appear on the eyebrows or eyelashes folks who have it are born with this condition and carry it throughout their entire lifetime if you really want to get rid of it there's always hair dye available but I personally think it looks super cool we all know cilantro really isn't everyone's cup of tea I don't know about you but it tastes like soap to me it turns out it's not actually a preference but rather a gene that causes the plant to have this vile taste instead a study performed on a group of about 30,000 people revealed that you can find a particular Gene variant in people who say that cilantro tastes soapy this Gene has more to do with the odor of the plant than the Tastee itself if you're one of those people but really want to give cilantro a chance either way there's a small trick you can try or ask the people that cook the meals in your household you can always crush the herb before using it in dishes why does that help well because with crushing the chemicals that are responsible for the Soapy taste are broken down and are less likely to taste unpleasant now nobody really knows why we need the appendix but it's always a at the back of the book wait wrong appendix some researchers claim the human appendix helped our ancestors process the tree bark and whatever they were eating at that time as we have a way more balanced diet now the appendix can disappear from our bodies without any consequences another purposeless thing in our bodies is the wisdom teeth yeah they used to come in handy when dentist didn't exist but now we can ideally make do without them your brain will grow by roughly 2% % if you venture into space under normal gravity it's thought that fluid in the brain naturally moves downwards when we stand up right but there is evidence that microgravity prevents this resulting in fluid accumulation in the brain and skull when you age your brain is gradually reducing in size by age 75 it's much smaller than at age 30 and it start shrinking at 40 it happens to everyone so you just have to go with it and keep your brain busy and Nimble if you stare into your eyes in the mirror you'll see a small pink circle settled in the corner of your eye this is your third eyelid useless for us but valuable for animals like birds to keep dust and Scattered debris from getting into their eyes this might sound familiar to you if you've heard of natural selection in short natural selection keeps body parts throughout Generations but some of them are harmful so they're phased out in the next generation and others that aren't staying just like the third eyelid not only your brain shrinks as you get older you too shrink dramatically the bones get more brittle the backbone gets compressed it works vice versa too when you rest at night your bones kind of relax too so you wake up taller than when you went to bed last night our ears help us keep the balance so hearing isn't their only duty our vestibular system occupies the inner ear canals in your inner ear contain fluid and Tiny sensors that look somewhat like hairs helping you keep your balance as for hairs only a few body parts aren't covered with them these are Palms the soles of the feet and lips hairs grow even in the belly button their purpose is to catch lint mine does a great job and not only lint our belly buttons have an entire animal encyclopedia in them with a range of about 70 different bacteria some of them can also be found in soil in Japan and even some bacteria typical for Polar Ice gaps see you have a whole Naval expedition going on and didn't even know it only about 43% of you is you you're over 50% tiny little creatures that mainly live in your gut and other body parts without ever leaving it still even though your cells are fewer than microbial ones there are on average about 100 trillion of them in you with this in mind your jeans are less than half of what you consider stuff if you take all the microbes dwelling within your body and count their genes it'll be anywhere from 2 to 20 million genes and their combinations if you sleep and I recommend that you do it doesn't mean all of your body sleeps in fact sometimes your brain has to work even harder when you're asleep it needs to process tons of information and reports usually take time one thing that indeed rests while you're sleeping is your nose you won't smell anything Nast nasty in your sleep the thing is that your sense of smell deactivates at night if there's some terrible smell in your bedroom you won't even be bothered scientists used to believe we could distinguish around 10,000 smells nope Recent research showed that people could indicate more than a trillion smells we also remember them better than anything else and odors can even evoke some Distant Memories meanwhile our strongest and most emotional memories are usually fake it's the way the central memory works it gives us the confidence to believe everything we remember is real even though we should be confident about fewer details now you don't mind if I call you a mammal do you well Among Us mammals only humans can always walk on two hind Limbs and keep that posture for their entire lives you may want to say that kangaroos or gorillas moveing the same way but kangaroos use their tail as a third leg and gorillas use the help of their long arm arms to keep balance your bones take part in metabolism too since they mainly consist of calcium when there's not enough of this element in your blood Bones start shedding it into the bloodstream balancing your body and vice versa when there's too much calcium in your blood it goes into the bones to be stored for later our height shape of our body and skin color depend a lot on where our ancestors used to live but we can adapt to new conditions even within our lifespan for example if you move from the plains to the mountains you'll eventually develop more red blood cells to compensate for the lack of oxygen and naturally if you drive from a colder climate to a hotter and sunnier one your skin will change pigmentation slightly to adap our lifespan is programmed within our cells they constantly renew and divide but they have a sort of internal timer that stops at some point some cells also stop reproducing sooner than others on average cells cease dividing when we reach the age of 100 if we find a way to trick ourselves into turning off the timer we could potentially live forever but we'd be a huge mass of wrinkles by then body fat acts as insulation material energy reserve and shock absorber your body sends the most fat into your waste region because that's where your internal organs are if something happens to you this layer of fat might as well protect those organs from serious is damage your skull isn't a single bone it consists of 22 different bones many of which are fused to protect your brain the Mand or the lower jaw is the only skull bone that's only attached to your head with connective tissues and muscles this is what makes it so mobile you can move it in any direction you like and the smallest bone in your whole body is inside your ear it's called the stapes and it's no larger than a grain of rice some of the strong muscles in your body aren't in your arms or legs they're in your head the massader is the primary muscle responsible for chewing and it needs to be the strongest for you to eat normally and you know those muscles that allow you to move your ears those are temporalis located above your temples they also help you to chew your food we've got two really fast muscles they control the eyelids opening in fact they're the fastest muscles in our body eyes are fragile and need protection so when the reflex is triggered these muscles shut the eyes within less than a tenth of a second we recognize only purple blue green yellow and yellow red colors everything else is a combination of these three it's impossible to calculate how many of these combinations the human eye sees because every single person has slight Vision differences but it's about 1 million combinations on average your stomach has an impressive capacity holding up to a half a gall gallon of liquids a whole large bottle of coke it's pretty hard to estimate how much hard food you can squeeze into your stomach since the food is processed with your teeth before it gets down there there's not enough room for a whole turkey but who knows probably a good siiz chicken might fit it and hey like my grandmother said there's always room for ice cream now show me where your stomach with all that Cola chicken and ice cream is if you're pointing at your tummy nope it's up there hair hidden in between your ribs your tummy is full of intestines let's see how many rare body features you or your friends have elf-like ears are pretty rare they are different because of the pointy part on the outside there's an additional cartilage fold in the middle area around the part we know as the scaffa most people are right-handed while about 10% of them are left-handed but there are those with no preference for using a Le or right hand they can play guitar use scissors right and perform all other activities with any hand they want only 1% of those can do it and we know them as ambidextrous and if you can talk out of both sides of your mouth you may have a future in politics less than onethird of the population can flare the nostrils on command the muscle in charge of this is weak because we have nothing to use it for that's why most people can't do such things with their nost on command people that live in Nepal and Tibet have a specific Gene that allows them to breathe at such high altitudes most people feel sick in such conditions but they are unique because they can breathe normally it's a super athlete gene they have there you can trace it back to densin a group that lived in the mountainous areas around Asia around 40,000 years ago this Gene brings them a higher level of oxygen carrying hemoglobin that's why the the body can distribute oxygen more efficiently so unlike us they won't feel oxygen deprived when performing certain tasks at such altitudes Arcus cenus is also pretty rare it's a white or gray Arc you can see above and below the outer region of the cornea in other words the clear Dome like thing that covers the front part of your eye it's something common in older people this Arc may become a complete ring around the iris the colored portion of the eye some people naturally don't need to sleep too much the majority of us cannot take a couple of nights of lost sleep without consequences but a small percentage out there has this special Gene that allows them to get away with sleeping six or even fewer hours which is about 2 hours less than average from 1 to 3% of the population has this so-called clock gene they can be more productive because they don't feel tired as we do when we sleep less Leonardo da Vinci Thomas Jefferson and some other famous historical figures were some of them now most people have three cones in their eyes so we can see a broad color spectrum but some have a rare fourth cone we call them tector chromat and because of this feature they can see up to 100 million colors the rest of us average folks see about 1 million colors it's a rare body feature you can mostly find in Wom wom have you heard of heterochromia it's a rare condition where people have eyes of different colors or different color sections in each eye sometimes this condition can lead to differences in color in some other parts of the body like hair or skin or it can result in irises with two different Hues heterochromia is a condition that happens because due to genetics some people have unevenly distributed melanin in their bodies and only 1% of the population has it chimerism is a rare genetic condition where a person has two completely different sets of DNA which we call genomes in their body one genome is predominant in one organ or generally one area of the person's body whereas the other is in other tissues or organs even animals can have this condition both animals and humans with chimerism can even have two different blood types in their body simultaneously and we may be talking about different amounts of each of those types it would be cool to have bones so dense almost nothing could break them some people have them thanks to an lrp5 gene mutation people with these Rock Bones have eight times denser bones than most when someone says there's a thing called Golden blood it's easy to imagine small particles of blood running through some people's veins but it's not quite like that nor does it have a golden color it's called this way because we're talking about a pretty rare blood group only about 40 people in the world have these people don't have all RH blood cell antigens which in simple terms means anyone who has another rare RH group can have this type as donor blood which is pretty helpful hey check this out it's something called a long Palmar muscle and it was way more important to our ancestors than to us some of them were pretty big fans of climbing trees so they developed a specific muscle and ligament to perform that through time and some people still have it even today to check if you have it just put the back of the Palm on a flat surface now touch your thumb and Pinky together and lift them slightly if you see your ligament popping out yep you have a long palar muscle some have photos sneeze reflex which is a special condition where people uncontrollably sneeze in response to Bright Light so the sun makes 10 to 35% of people sneeze if you have a perfect pitch you should know it's really not that common it's when someone is able to identify and tell different musical notes based on their frequencies so if you hear a D sharp you can tell it's a dsharp without too much guessing fewer than one in 10,000 people say they can have a perfect pitch and it's still not sure if you get it naturally or if if it's necessary to develop it at a very early age because research showed you can develop a perfect pitch it takes a lot of training and consistency to immediately tell the key and notes of your favorite song not many people have naturally blonde hair and red hair is even rarer less than 2% of the population has it and 11% of the human race have naturally curly hair we all learned in school that the heart is leaned toward the left side of the chest but certain people have it on the right side it doesn't necessarily mean this condition would have some negative consequences but it can affect the rest of the organs around 22% of the human race has Morton's toe and Morton wants it back just kidding Morton's toe is when your second toe is longer than the big one if you look carefully you'll see the Statue of Liberty has Morton's toe some have this tiny bump on the inside of the upper part of their ear it's known as Darwin's bump or Darwin's Tule some even believe people who have this little bump potentially sense voice tonality better only 16% of people across the globe can produce a roaring noise in their heads they do it by using their jaw they control a tiny muscle in the jaw that prevents it from hearing certain noises like chewing but when the these people Flex it they can hear a roaring noise from inside about onethird of the population can gleck and just 1% can do it on command not that useful but still rare 4% of people have Reno syndrome this is when a part of your body usually your fingers or toes start to turn white when exposed to low temperatures it's your body's overreaction to cold or distress now check your fingerprints are they looped Whirled or arched the first two types are more common while just 5% of people have arched fingerprints not many people have birth marks only 10% of them in most cases birth marks are oval and have a coffee type color dimples may seem like something common but only a quarter of the world's population have them you can have one or two dimples and there's something we inherit so if if your parents have it mhm that's it for today so hey if you pacified your curiosity then give the video a like and share it with your friends

Channel: BRIGHT SIDE

Views: 23,801

Keywords: brightside, brightsideglobal, curiosities, earth, mystery, planet, world

Id: kckKLuEFD5Y

Length: 122min 32sec (7352 seconds)

Published: Sun Apr 28 2024