NPACI Rocks is probably your best bet. http://rocksclusters.org/
jage2 writes "Researchers say they have located the world's oldest stash of marijuana in a tomb in a remote part of China. The cache of cannabis is about 2,700 years old and was clearly 'cultivated for psychoactive purposes,' rather than as fibre for clothing, or as food, says a research paper in the Journal of Experimental Botany. The 789 grams of dried cannabis was buried alongside a light-haired, blue-eyed Caucasian man, likely a shaman of the Gushi culture, near Turpan in northwestern China."