Real Reason Why Megalodon Went Extinct

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A predator stalked the ancient  seas. A shark so large and fearsome,   nothing in the seas could escape its hunger. Here are fifty of the most  insane facts about the Megalodon. #50. Jawsome The main way most people know the  megalodon shark is through recreations   and reconstructions of its jawbone. You can  usually see it on display hanging in museums,   including the Museum of Natural History in  New York City. It looms over people - and a   close-up look indicates that we’d be nothing  more than a snack for the giant shark.   The jaws could reach around three meters  wide, more than big enough for an adult   human to stand in between them. It’s estimated the  shark could swallow two people at the same time. But we don’t know as much as we  would like about the Megalodon. #49. Mystery Monster It’s not hard to find Megalodon jaws on display,   but why doesn’t any museum have  a complete Megalodon skeleton?   No one does - because they’re impossible to find.  Their skeletons were made of cartilage, not bone,   and cartilage degrades quickly and doesn’t  fossilize. So the exact anatomy of Megalodon   sharks has been lost to the ages, but we can guess  what they were like based on similar sharks today. But one area of the Megalodon  left us a lot of evidence. #48. A Sharp Reminder The vast majority of Megalodon fossils  are teeth, and sharks have no shortage of   those. The Megalodon had a shocking 276 teeth  lining its massive mouth. Because sharks shed   their teeth and regrow them frequently,  the ancient predator littered the ocean   with its larger-than-average chompers. How  much larger? A single megalodon tooth fossil   found in South Carolina weighed around three  pounds and measured six and a half inches. And these teeth have been found for a long time. #47. A Founding Find A Megalodon tooth is quite the collector’s item to  put on display in the office. One founding father   agreed - Thomas Jefferson was an avid fossil  collector, and had pieces of large ancient   animals in his home. He had Mastodon and other ice  age fossils- but his Megalodon tooth may have been   his favorite, and he had a unique way of marking  his Megalodon tooth - he put his signature on it. And sometimes these teeth are  found in unexpected places. #46. That Bites Some Megalodon teeth are found lying around  from when they fall out, but others came   out prematurely - when the Megalodon bit into a  large animal and bit off more than it could chew.   Scientists have found the bones of ancient  whales to contain embedded Megalodon teeth,   likely indicating a close escape from death or a  fatal attack. Sometimes it’s just markings from   where the Megalodon bit, but whale vertebrae  with a few embedded teeth have been found. And they had quite the bite. #45. Crush Factor Bite force is measured in Newtons and for a long  time, the Tyrannosaurus Rex was believed to have   the most powerful bite in history. It’s not  hard to see why - look at those mighty jaws!   But after studying the Megalodon, scientists  now believe the ancient shark had an even more   powerful bite - packing a stunning pressure  of up to forty thousand pounds. There’s no   way of proving it conclusively, but it may be the  most powerful bite of any creature to ever live. Now let’s break down the rest  of this massive creature. #44. How Big? With no Megalodon skeletons available and  only the teeth and vertebrae still existing,   scientists had to extrapolate to figure  out just how big it actually was. Their   conclusion - it was really big. The smallest adult  Megalodons were likely around thirty-three feet,   but much larger teeth have been found. The  estimate of the largest Megalodons ever is   as much as sixty-seven feet long, making them  one of the largest marine predators of all time. So how did they compare to today’s alpha shark? #43. Not So Great White The Great White Shark is probably  the most feared living shark,   with almost no natural predators and being  responsible for more bite attacks on humans   than any other shark. But compared to the  Megalodon, it’s a shrimp. The largest female   Great White Sharks are around 20 feet in  length with most being no more than fifteen   feet. Surfers everywhere breathe a sigh of relief  that they won’t be encountering any Megalodons. And they haven’t for a very long time. #42. Not a Man-Eater Would the Megalodon like to chow down on a human?  Maybe. Did they ever get to? Nope - because they   were gone from Earth long before we were on it.  The estimate of when Megalodon lived is around 23   million years ago, at the beginning of the Miocene  era. They stuck around as the ocean’s most feared   beast until around 3.6 million years ago, long  before humans evolved into their current form. And their closest descendant  may not be what you think. #41. Missing Link Most people depict the Megalodon as a giant Great  White Shark when it appears in TV and movies.   In reality, while their tooth shape is pretty  similar, they seem to have evolved separately   and have some similar traits. But the Megalodon  does have a closer living relative - it’s the   smaller Mako shark. And in fact, ancient  great white sharks were around at the time   and may have wound up being bullied out  of the hunting grounds by the Megalodon. So what did these giant beasts  eat? Anything they wanted. #40. Hungry Hungry Sharks The Megalodon was one of the largest sea animals  of the time and had no natural predators - would   you want to pick a fight with it? As such, it’s  believed it was fairly indiscriminate in what it   ate - if it swam in its hunting grounds and seemed  edible, it was food. Megalodon likely ate a lot of   fish as well as any cephalopods or reptiles that  came into its orbit and went for some bigger prey   like ancient whales as well. And the odds are  anything it set its eyes on wasn’t getting away. But one part of its diet may  be a bit more controversial. #39. Cannibal! Did Megalodon eat other sharks? It’s believed by  scientists that they did. Most other sharks at the   time were much smaller than the Megalodon, and  while they may not have been the killer shark’s   preferred food, it likely had no problem  chowing down when needed. This is fairly   common in nature - while it’s unlikely for land  predators to hunt each other, it’s pretty common   in the modern seas for one hungry fish to wander  into the hunting grounds of another and - chomp! But it’s likely nothing was hunting the Megalodon. #38. Welcome to the Apex The Megalodon was an Apex Predator - aka  a predator at the top of the food chain.   While food chains on land usually only have a  few levels, it’s common for there to be many   levels in the ocean and a look at the prehistoric  climate indicates there was nothing that could   have hunted the Megalodon. While there may have  been some animals that could give it a fight,   it’s more likely to be a competition for prey  than an attempt to make the Megalodon their prey.   It was truly the king of the prehistoric seas. But how would it do against  other apex predators of the sea? #37. Whale Wars Megalodon wasn’t the only apex predator of its  era - and one was almost as massive. Livyatan,   a massive extinct sperm whale, was  given an impressive name - inspired   by the biblical leviathan. Its powerful  jaws snapped up seals and smaller whales,   and it competed with the Megalodon for prey.  But how did it compare to the Megalodon?   It was between 44 and 57 feet  long and had large, sharp teeth.   While Livyatan had thicker skin and could attack  with its tail, Megalodon is believed to have had   the more powerful bite force - so if the shark  gets the drop on the whale, it’s likely over. Now let’s head back to the beginning. #36. Not a Shrimp How would Megalodon compare against  the very first known apex predator?   Let’s turn the clock back to the Cambrian  period when the Anomalocaris ruled the seas.   This large shrimp-like arthropod had a huge  tail fan and grasping front appendages to   snatch up any creature of the era. It was the  terror of the Cambrian - and to the Megalodon,   it would be nothing more than a light snack.  This apex predator was little more than a   foot long and could be swallowed whole with  ease. Apex predators had a long way to go. Let’s jump forward a little, as things get fishy. #35. Hard-Headed The Devonian period was where we saw the  birth of the first kings of the seas - large,   bony fishes. And their king was the Dunkleosteus,  known for its distinct, armored head and its large   snapping jaws. It was large, having a length  of up 28 feet and weighing more than four tons.   Its bite force was over 1,300 pounds -  unparalleled for the era, but nothing   compared to the Megalodon. If the two fought,  Dunkleosteus’ only hope would be its armored   head breaking some teeth on the Megalodon, but  the odds are its fleshy bits would be easy prey. Now let’s jump forward to the Jurassic  period - when reptiles dominated the seas. #34. The First Reptile King It was the early Jurassic, and a  fearsome predator ruled the seas.   Named Liopleurodon, it was a short-necked  plesiosaur with a large body and one deadly   feature - a long snout containing powerful  jaws full of sharp teeth. Its bite force   was as much as 33,000 pounds - one of the most  powerful ever recorded alongside the Megalodon.   It was likely the first of the apex predators  who could have given Megalodon a true fight,   but its smaller size - up to twenty-one feet in  length - would put it at a disadvantage. So would   its more vulnerable neck - one bite in the wrong  place from the shark and it’s likely game over. And as the age of the dinosaurs drew on, the  apex predators of the seas only grew larger. #33. Cretaceous Warriors Mosasaurus ruled the seas during  the last days of the dinosaurs,   and it’s not hard to see why - this lizard was  big. It was over twice the size of Liopleuredon,   with its length topping out at fifty-six feet  in the biggest specimens. It was also much more   agile than other large predators, with its  four limbs steering it and its jaws and neck   more flexible than other predators of the era. But  its jaws weren’t quite as big as its competition,   with a bite force of only 16,000  lbs. Mosasaurus might be able to   elude the Megalodon effectively, but  it wouldn’t be able to get a bite in. But was it truly the king of the cretaceous? #32. Fear the Kronosaurus It might not have been the biggest sea predator  of the era, but the Kronosaurus might have been   the deadliest. It ranged from thirty to  thirty-six feet and was most known for   its massive, snapping jaws. Powerful enough  to grab large plesiosaurs out of the water,   its jaws had a bite force of up to thirty  thousand pounds, more than six times as   much as a modern-day crocodile. That’s still  a little below the Megalodon, and its smaller   size and lack of mobility mean it would need  a lot of luck to go up against the mega-shark. And as the age of the dinosaurs  ended, new threats emerged. #31. Crocodile Rock Crocodiles have been around for over a hundred  million years, largely unchanged. If you were   a massive reptilian killing machine, why would  you fix what’s broken? But in the waning days   of the cretaceous, crocodiles were one thing  - bigger. The Deinosuchus could reach up to   thirty-five feet in length and had the same  powerful snapping jaws as today’s alligators   and crocodiles. Its bite force was stronger  than that of Tyrannosaurus at 18,000 lbs,   but still well below Megalodon, and due to  its slower nature as an ambush predator,   it’s unlikely it could get  the drop on the Megalodon. And as we headed into the age of mammals,  new powerhouses dominated the seas. #30. The First Whale King. You might be fooled into thinking the reptiles  of the dinosaur era survived somehow, but the   Basilosaurus was something else entirely. An  early marine mammal, it was the apex predator of   the Paleogene seas and would regularly eat sharks  and early dolphins. At up to sixty-six feet long,   its serpent-like body was meant for fast  movement. But its bite force of 3600 pounds   was nothing compared to the Megalodon, and  it’s believed to have eaten most of its prey   alive. It had its eyes on smaller prey, and  would likely give Megalodon a wide berth. Megalodon was the king of the ancient  seas - but would that be true today? #29. The Modern Whale King The largest animals to ever live are in  today’s seas, including the massive blue whale.   This filter-feeding whale is the largest animal  of all time, but it’s not a predator. The king   of today’s predators is the modern Sperm Whale, a  bulky creature that can reach sixty-eight feet in   length. Its head is a third of its length, and it  has the largest brain of any animal. Unlike other   whales of its size, it hunts and eats massive  amounts of fish. But because they have smaller   teeth, their bite force is much less than their  ancestor the Livyatan. They’re large enough to   give the Megalodon a good fight - but they’re  not evolved to fight a shark of this size. So the Megalodon might be the king of the  seas - but is it truly the king of the sharks? #28. Whale or Shark? The Megalodon dwarfs any predatory shark  today, but there’s one that compares in size.   The Whale Shark is a massive beast, reaching  over sixty feet in length and being the largest   non-mammal vertebrate on the planet. But it’s  not a threat to anyone except plankton and tiny   fish - it’s a filter-feeder like many whales.  While its size is comparable to the Megalodon,   no specimen has been found to reach the size  of the largest estimated Megalodon - so it’s   likely the Megalodon maintains its  title as the king of the sharks. And we’re still learning all we can  about this massive apex predator. #27. Heavyweight Megalodon, known by scientists as Otodus  Megalodon, wasn’t just one of the deadliest   predators to ever live - it was one of the  largest. The massive shark is estimated to   have weighed roughly a hundred tons at  the high end. That makes it the weight   of more than two eighteen-wheeler  trucks or almost fifteen elephants. And they were big from the get-go. #26. Baby….well, you know the rest While most fish lay eggs, the majority of  modern sharks give birth to live young.   That was likely also the case for the Megalodon  - and a baby Megalodon was still terrifying.   Scientists collected samples of young megalodon  teeth, and the smallest specimens they found   indicated that babies were still larger than  an average human - with newborn Megalodons   being around six and a half feet long. And it  didn’t take long for them to start hunting. And sometimes, you could find  a lot of them in one place. #25. Hush Little Baby A nursery usually brings to mind some nice images  of many babies being cared for. But a Megalodon   nursery would have been a very different place.  But that’s exactly what scientists found off the   coast of Panama - a fossil collection  full of the teeth of young Megalodons.   Sharks use warm-water nurseries with  shallow water to protect their young,   allowing them to hunt smaller prey before they  take their rightful place atop the food chain. And their biology might not have  been exactly what was expected. #24. Hot-Blooded Most fish are cold-blooded, but scientists  increasingly think that Megalodons may have been   built differently. Called regional  endothermy, it gives these massive   sharks the ability to warm their bodies  independently when hunting in colder waters,   giving them greater endurance and range  than most deep-sea hunters. And this has   persisted to the present day - another creature  with this ability is the Great White Shark. But how did they get so big? #23. Everything’s Bigger in the Mesozoic The era might have been the Texas of time periods  because the Mesozoic era saw some of the largest   mammals and other creatures to ever walk the  Earth. While they didn’t reach the size of the   biggest dinosaurs, animals in this era benefited  from a high level of nutrients in the ocean.   They grew larger, and that meant an abundance  of large prey in the seas for large predators   to develop. But Megalodon outclassed almost all  of them - whales were among its favorite food. And they had unusual hunting techniques. #22. Blam! You might think Megalodon’s best weapon was  its razor-sharp teeth or its crushing bite.   But while those might be great up-close  weapons, it actually relied on another   element to give it an edge. It was fast and it  was strong - and when you combine those things,   it could have rammed prey at a high speed.  Fossils of prey animals discovered had shattered   spines before they were eaten - the kind of thing  that happened when a mega-shark body-slams you. But they were also masters of stealth. #21. Dun-dun Why is the ocean one of the hardest places to  avoid a predator? Because they can come at you   from all directions. On land, a wolf isn’t  going to ambush you from below the ground-   though Graboids certainly will. While  Megalodons were good hunters and could   easily sneak up from behind, they  could also come up from under their   prey - ambushing them from below like a black  hole ringed with countless razor-sharp teeth. And it was not easy to get away. #20. Speed Sharks Megalodons were huge, and that  usually doesn’t pair well with speed.   But as chunky and bulky as these killer sharks  were, they’re actually believed to be very fast.   Scientists studied similar sharks and  came up with an estimate that they   could swim around eleven miles an hour -  faster than many of their prey animals,   and more than twice the speed of  the fastest human swimmers today. And it wasn’t going to be easy to avoid them. #19. They’re Everywhere The primordial seas were far different than  today’s, and the geography of the oceans was   different. But one thing was sure no matter where  an animal was swimming - a Megalodon wasn’t far   away. The sharks were around most areas of the  world, and we know this because their fossils have   been found on every continent of the world besides  Antarctica. They weren’t cold-weather hunters. And humans have been wondering about  these creatures for a long time. #18. Ancient Aliens? The first evidence of the Megalodon was teeth,  found almost two thousand years ago. But there   were no paleontologists in those days and  the diggers who found strange giant teeth   were left with one question -  what are these strange triangles?   There were a lot of them, which led  Roman philosopher Pliny the Elder to   speculate they were gifts from the  stars that fell during eclipses. And in the middle ages, there  were even odder theories. #17. There Be Dragons It was still hundreds of years before the  discovery of fossils would become commonplace   and they would be identified, but there were  still interesting theories. Many believed   these strange triangles were actually dragon  tongues or scales. They had never seen a dragon,   but the look kind of matches. That led the teeth  to become fashion statements - people would wear   them as pendants - and good luck charms that  people would use in traditional medicine. But eventually, there was a eureka moment. #16. The Discovery It was 1611 when Italian Naturalist Fabio  Colonna realized what these mysterious   items actually were. They weren’t eclipse  tears or tongues, they were shark teeth.   It would be more than fifty years before it was  proven to the scientific community, as Nicolaus   Steno published a work discussing the anatomy of  a shark. Shockingly, the teeth looked exactly like   giant versions of those teeth, and people realized  that the ancient oceans were a very scary place. The work of recreating the  Megalodon would increase from there. #15. An Iffy Estimate Only teeth and jaw fragments of the Megalodon  were found, so it fell to scientists to try to   create a better picture of its size. The first  to try successfully was American zoologist   Bashford Dean in 1909. He created a massive jaw  that could have belonged to a creature almost   a hundred feet long - but he had overestimated the  cartilage size. Over the decades that followed,   different scientists would have different  estimates and the debate is ongoing to this day. But another piece of evidence has been found. #14. Ew Aside from teeth, jaw fragments, and vertebrae,   one more piece of evidence has been found  - coprolites. These are fossilized pieces   of Megalodon poop and have given scientists  the only known evidence of the creature’s   internal physiology. This is because the poops are  spiral-shaped, indicating that the sharks’ lower   intestines may have been corkscrew-shaped.  This is similar to many of today’s sharks. And the Megalodon has made a big  impact ever since it was discovered. #13. Place of Honor Forty-five of fifty US states have a state  fossil, usually one found within their borders.   The most common choices include Mammoths,  dinosaurs, prehistoric mammals, or even ancient   fish and squids. But two states picked sharks.  Georgia picked a patch of smaller shark teeth   from the Cretaceous-Miocene era, and North  Carolina picked the Megalodon’s massive chomper. And soon enough, Hollywood got into the action. #12. Shark Attack! The 1970s blockbuster Jaws, based on the  book by Peter Benchley, made millions of   people in America terrified of sharks. Its  oversized robot shark, nicknamed Bruce,   was one of the most advanced robot-beasts ever  used in the film. But compared to the Megalodon,   Bruce was actually a shrimp - less than  half the size of the legendary beast. But the Megalodon would make  its film debut soon enough. #11. Schlock Shark The low-budget film company The Asylum,  notorious for rip-off movies like Snakes   on a Train and Transmorphers, would get in  on the action with the Mega Shark series.   A giant shark would somehow get into battles with  other creatures like Giant Octopus or Crocosaurus.   Needless to say, there was very little in the  way of scientific accuracy in these films. But one franchise would  give the Megalodon its due. #10. Call Him Meg Writer Steve Alten knew the Megalodon  was primed for a starring role,   and his 1997 book Meg: A Novel of Deep Terror,  brought the Megalodon back into the public eye.   It spawned several sequels and fans waited for  a movie adaptation. They waited 21 years, but   the 2018 action movie The Meg pitted Jason Statham  against the ancient beast. While the movie wasn’t   believed to be entirely accurate if you asked  paleontologists, they got closer than The Asylum. Did you ever want to face the Megalodon head-on? #9. Boss Fight In 1998, video game fans got a chance to come  up close and personal with the Megalodon.   They just had to step inside a video  game cabinet called The Ocean Hunter.   This Japanese rail shooting game pitted a  steampunk hunter against a host of sea monsters.   The bosses included a giant squid, a massive  anglerfish, an Elasmosaurus, and yes,   a Megalodon. Ironically, the giant shark here  was named Leviathan - closer to its whale rival. But one place saw the Megalodon  get an even bigger spotlight. #8. Welcome to Shark Week For one week every year, the Discovery  Channel airs a host of documentaries and   pseudo-science programs dedicated to sharks.  While marine biologists have claimed this is   sensationalistic and puts sharks in more  danger, it’s their highest-rated week of   the year. It was only a matter of time before  the Megalodon got into the spotlight - and in   one fictionalized film on Animal Planet, they even  had the massive shark going up against mermaids. But one piece of content  was even more controversial. #7. Extinct or Not? In 2013, Discovery Channel featured a film  titled “Megalodon: The Monster Shark Lives”.   It was a collection of evidence that the shark  was still around and stalking the oceans,   with only one problem - it  was all completely fictional,   with even the scientists appearing turning  out to be paid actors. Discovery Channel was   hit with a wave of bad press, laughed all the  way to the bank, and produced several sequels. But is there any real evidence  that the Megalodon is still alive? #6. Blast From the Past In 1873, everything we knew about the Megalodon  was challenged when the HMS Challenger discovered   a cache of seemingly fresh teeth. Scientists  dated them to as little as 11,000 years   old - which would mean the shark was sharing  space with humans. But further investigation   revealed the well-preserved teeth actually had  a coating of manganese dioxide, which gave them   a much lower rate of decomposition and gave  them a white appearance even when fossilized. But if the Megalodon is  truly gone - how did it die? #5. Deep Freeze One of the first theories was climate change  - a word we’re hearing a lot about now.   The last Megalodon fossils are dated around the  time of an ice age, and scientists thought that   might have finished off the massive beasts.  The sharks preferred warmer climates and their   young relied on them, and their prey moving  to colder waters might have finished them off. But there’s reason to doubt this theory. #4. Polar Bear Club Scientists continuing to study Megalodon  physiology discovered that the sharks   likely could swim in waters near the freezing  point. This was one of the best pieces of evidence   yet that they could have weathered the changing  climate, due to not being fully cold-blooded. But just because they could survive,  doesn’t mean anything could. #3. Hunger Pangs What actually killed off the Megalodon?  The most likely theory is that they died   due to changes in the food chain. While  they could survive in harsh climates,   many of their preferred prey animals went  extinct during the ice age. Being massive,   the Megalodon needed a lot of food, and as the  climate changed, it became harder and harder   to find it. Competition became tougher and the  population dwindled - eventually to nothing. But could they still be lurking deep down below? #2. Predators of the Deep A common theory and one that shows up in a lot  of fictionalized Megalodon stories is that they   survived and became deep-sea predators - down  where no one can see them. But this is unlikely.   The deep-sea ecosystem doesn’t have enough food  sources to sustain massive carnivorous beasts. This leads to one simple fact. #1. Hail and Farewell The Megalodon is most definitely extinct. While  the exact cause of its extinction isn’t known   beyond a doubt, most of the giant animals on land  and sea died around this era. And while theories   abound, one fact is not up for debate. Not only  have no Megalodon fossils been found dated less   than 2.6 million years, but no evidence of their  teeth or bites on other animals can be found.   If Megalodon was still around, it would need  to eat. So the logical conclusion is that   it’s joined the dinosaurs - and swimmers  everywhere can breathe a sigh of relief. Want to know more about how  this massive beast met its end?   Check out “The Why and How of the Megalodon  Extinction (What Killed the Giant Shark)”,   or watch “Largest Animals Size Comparison”  for how it fares against the big guns.
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Length: 25min 8sec (1508 seconds)
Published: Sun Feb 06 2022
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