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

Posted on 16 Jan 2020 in Earth Science, Evolution, Journalism

About 310 million years ago some sharks had saws for jaws – and now we know how one of those sharks, called Edestus, fed. The “saw blade” 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. Image: Jesse Pruitt

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Hagfish tie their bodies into complicated knots to escape tight spots

Posted on 6 Jan 2020 in Animal Behaviour, Journalism, Life

Hagfish literally tie themselves in knots to escape a tricky situation – and that includes tying their bodies into complicated three-twist knots. Image: Haney and Uyeno

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