Comments by "kade 7263" (@kade-qt1zu) on "Ancient Predator Had a Killer Jaw | National Geographic" video.

  1. It exists.
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  2. Sharks have skeletons made of cartilage, which decays much faster then bone.
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  3. They survived from the carboniferous all the way to the Triassic. Whatever they were doing, they were doing extremely well.
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