The oldest evidence of psychoactive plant use was found in the Andes, revealing how societies used mind-altering drugs to ...

Inside, researchers found nicotine from wild Nicotiana species and vilca, a psychedelic powder derived from the vilca tree.

As Peruvian biologist Constantino Aucca Chutas sat chewing coca leaves with a local elder high in the Andes, his companion pointed to a peak known as Demon Mountain and shared how its rocky slopes ...