The striking similarities between the cave finds and historical examples of drinking cups made out of skulls further support a ritual role for the ice age receptacles , bello says .
" It shows , really , how skilled these people were in shaping the skull , and also the fact that it was a very complex ritual , " said silvia bello , a paleontologist at the natural history museum in london and the study 's lead author .
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Bones excavated at a cave there include the oldest known examples of drinking cups or containers made out of human skulls , says a team led by paleontologist silvia bello of the natural history museum in london .
