-earliest evidence
https://pubmed.ncbi.nlm.nih.gov/1548898/
https://en.wikipedia.org/wiki/Shanidar_Cave
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3358962/
https://www.takingcharge.csh.umn.edu/how-long-have-humans-used-botanicals
https://www.healthline.com/health/plants-as-medicine-history
https://www.sciencedaily.com/releases/2011/12/111208151220.htm
https://www.motherearthliving.com/plant-profile/the-origins-of-herbal-medicines
https://www.hindawi.com/journals/ecam/2014/525340/
-evidence of Ayurveda, TCM
-more recent