GeneralUpdated November 8
Ancient hair yields earliest known evidence of psychoactive cannabis use.
A hair sample from a Siberian burial mound, roughly 2,800 years old, tested positive for cannabis. Researchers describe it as the earliest known evidence of people using the plant for psychoactive purposes. It’s an unassuming clue for a finding with a long reach: a strand of hair carries the record almost three millennia back. The find marks the oldest evidence known so far, not the beginning of cannabis use.
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Coverage started November 5