Due to their soft bodies and ephemeral nature, it is unlikely that biological evidence of mushrooms will even be discovered in the archaeological record. This fact poses certain difficulties in determining the antiquity of modern cultural uses of psychoactive mushrooms, like those in Mexico and Siberia, and makes it even more difficult to determine whether psychoactive mushrooms were recognized and used by historical culture groups that are now extinct.
John Rush, Entheogens and the Development of Culture: The Anthropology and Neurobiology of Ecstatic Experience
culture, entheogen, hallucinogenic