5,000-year-old skeleton masks and skull cups made from human bones discovered in China

Skulls made into a mask (left), skull made into a cup (right).

Skull cups and skeleton masks have been discovered among a pile of 5,000-year-old discarded human bones in China, according to a new study.

The sculpted skulls were found jumbled up with pottery and animal remains, but the purpose of the macabre items has so far eluded experts.