TIME Paleontology

What Killed The Dinosaurs? Bad Luck, Study Suggests

The asteroid was simply the straw that broke the camptosaurus's back

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While it’s widely accepted that dinosaurs were made extinct by a six-mile long asteroid that hit Earth, a new study posits that the asteroid was simply the last piece of bad fortune in a run of poor luck that killed the species.

According to the newly released paleontology report titled ‘The Extinction of the Dinosaurs’ – published by the journal Biological Reviews - the dinosaurs could have likely survived the asteroid, had it not been for the unfortunate environmental conditions they were already facing as a species.

Hebrivores were already decreasing in population at the time, says the report, and the loss in biodiversity created a great deal of problems for dinosaurs, most specifically less food available at the bottom of the food chain.

“If the asteroid hit a few million years earlier, when dinosaurs were more diverse, or a few million years later, when they had a chance to recover as they often had done before after diversity losses, then dinosaurs probably wouldn’t have gone extinct,” said University of Edinburgh paleontologist and evolutionary biologist Stephen Brusatte, who led the study.

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