Marijuana was found in the tomb of a shaman somewhere in northern China to be used in the afterlife

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.

read the whole story on http://www.thestar.com/sciencetech/article/544684 (found via othercrap.com)