Neanderthals, where on Earth did you go?

It seems they found a Neanderthal skull, with butcher marks, in a human bone midden.  

How Neanderthals met a grisly fate: devoured by humans | Science | The Observer

But not every team member agrees. "One set of cut marks does not make a complete case for cannibalism," said Francesco d'Errico, of the Institute of Prehistory in Bordeaux. It was also possible that the jawbone had been found by humans and its teeth used to make a necklace, he said.

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"This does not prove we systematically eradicated the Neanderthals or that we regularly ate their flesh. But it does add to the evidence that competition from modern humans probably contributed to Neanderthal extinction."