Signs of ritual pot smoking found in ancient Chinese graves
By CHRISTINA LARSON, AP Science Writer WASHINGTON (AP) — Archaeologists have unearthed the earliest direct evidence of people smoking marijuana from a 2,500-year-old graveyard in western China. In a complex of lofty tombs in the Pamir Mountains — a region near the borders of modern China, Pakistan and Tajikistan — excavators found 10 wooden bowls and several stones containing burnt residue of the cannabis