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An asteroid killed the dinosaurs

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nigglynellie Wed 20-Apr-16 17:30:26

I can't imagine, but I read that apparently dinosaurs were becoming extinct about a million years or more before the asteroid struck. Didn't really say how anyone knows this!!!!!! Can't help about the boreholes though, but it's a novel idea!!!!

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thatbags Mon 18-Apr-16 06:02:47

How does an invisible underwater crater prove that an asteroid killed the dinosaurs by Michael Benton. The bit I like best is where he tells how boreholes made by a Mexican oil company helped provide evidence.

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