A study in the Journal of Morphology shows how the bizarre prehistoric ratfish called a Helicoprion ate with its unique set of choppers. A Helicoprion was a prehistoric ratfish that featured perhaps ...
The world’s only animal, past or present, with a complete 360-degree spiral of teeth was Helicoprion, which sliced into prey like a buzzsaw. This sharklike fish, which lived 270 million years ago, is ...
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