article_snippet: Aconitum was found inside this pot on the right thought to date from 1926 .
article_snippet: Opium, magic mushrooms and other psychoactive drugs have been used by humans for thousands of years.
article_snippet: An anthropologist has discovered that humans have been cultivating and using mood-altering substances since the Stone Age.
article_snippet: Professor Elisa Guerra-Doce has compiled evidence from around the world that Neolithic people were taking drugs derived from cacti in 8,600BC and that Neolithic people were cultivating opium poppies by around 6000BC.
article_snippet: Researchers have also found reddish stains on 13,000 year old human teeth found in a burial pit in Duyong Cave on Palawan Island in the southern Philippines, which are thought to be caused by chewing the leaves of the betel plant.
article_snippet: It is still chewed through out much of Asia as a mild stimulant.
article_snippet: Charred cannabis seeds have also been found in bowls that date from the Bronze age Pit-Grave culture that appeared in Romania around 2000BC.