One scientist thinks he know why the Neanderthals went extinct: We ate them.

A team led by Fernando Rozzi, of France's National Center for Scientific Research, re-examined modern human bones found in a cave near Les Rois in southwestern France and found that one jawbone was instead Neanderthal.

Crucially, it was covered in cut marks, indicated it had been butchered. The human bones were untouched.

"For years, people have tried to hide away from the evidence of cannibalism, but I think we have to accept it took place," Rozzi told London's Guardian newspaper.