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Scientists investigating a 2,800-year-old Siberian tomb found roughly 1,000 cannabis seeds and chemical evidence that ancient Scythians used the plant for its intoxicating effects. ScienceDaily reported the find was surrounded by evidence of elaborate burial rituals and animal sacrifices. The tomb offers what is described as the oldest directly dated archaeological evidence of psychoactive cannabis use. The findings add to understanding of Scythian burial practices.