Eons

Season 1, Episode 11

Episode Title: The Strange Case of the Buzzsaw Jaws

Air Date: 2017-09-11

Overview:

There 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.