精东传媒

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Ancient shark used its teeth like the blade of a power tool

By Colin Barras

16 January 2020

Reconstruction of edestus

Edestus grew to the size of a modern great white shark

Jesse Pruitt

About 310 million years ago 鈥 and now we know how one of those sharks, called Edestus, fed. The 鈥渟aw blade鈥 in its lower jaw glided backwards and forwards like the blade on some modern power tools, allowing the shark to cut through soft prey like fish.

We know that Edestus was a very odd shark that grew to the size of a modern great white. It had what look a lot like two saw blades in its mouth 鈥 one…

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