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... Alcohol to Ecstasy." However, the book's authors point out that the plant was likely cultivated long before then. They recount the discovery of a nearly 3,000-year-old Egyptian mummy containing traces of THC, the main psychoactive chemical in marijuana. It could be that cannabis was used as some type of medicinal herb during this time. Cannabis sativa is perhaps the most recognizable plant in the world. Pictures of the ubiquitous green cannabis leaf show up in the news media, textbooks and drug-prevention literature, and the leaf's shape is made into jewelry, put on bumper stickers and clothing and spray-painted on walls. The leaves are arranged palmately, radiating from a common center like the fingers of a hand spreading apart. Although most people know what the cannabis plant looks like, they may know very little about its horticulture. Cannabis sativa is believed to be a native plant of India, where it possibly ...