Incense burners found at 2,500-year-old cemetery suggest intentional use of to get high

Scorched wooden incense burners unearthed at an ancient burial ground in the mountains of western China contain the oldest clear evidence of cannabis smoking yet found, archaeologists say.

Residues of high potency cannabis found in the burners, and on charred pebbles placed inside them, suggest that funeral rites at the 2,500-year-old Jirzankal cemetery in the Pamir mountains may have been rather hazy affairs.