Eons
The Strange Case of the Buzzsaw Jaws
TV-Y7
S1 E11 Sep 10, 2017 10mThere are many fossils that challenge our ability to form even the most basic idea of how a living thing looked, or lived, or functioned. One of the longest-running of these mysteries involved a 270-million-year-old sea creature called Helicoprion that once swam the seas around the supercontinent of Pangea.
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