Did you know that Cannabis ASHES contains THC? "There is only one direct source of evidence (Δ6-tetrahydrocannabinol [Δ6-THC] in ashes) that cannabis was first used medicinally around 400 ad" I read a few others. Citation: Bridgeman MB, Abazia DT. Medicinal Cannabis: History, Pharmacology, And Implications for the Acute Care Setting. P T. 2017 Mar;42(3):180-188. PMID: 28250701; PMCID: PMC5312634. link: ( in comments
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5312634/