Pourquoi la nuit est-elle noire? | Hervé Dole | TEDxÉcolePolytechnique
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Channel: TEDx Talks
Views: 44,894
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Keywords: TEDx, astrophysique
Id: WA0iOK6KXK0
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Length: 17min 13sec (1033 seconds)
Published: Mon Jul 20 2015
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