The Strange Case of the Buzzsaw Jaws

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. Produced in collaboration with PBS Digital Studios: Want to follow Eons elsewhere on the internet? Facebook - Twitter - https://t