29 abril 2015
Climate change may be responsible for the abrupt collapse of civilization on the fringes of the Tibetan Plateau around 2000 B.C. according to archaeologists who found that cooling global temperatures at the end of the Holocene Climatic Optimum, a 4,000-year period of warm weather, would have made it impossible for ancient people on the Tibetan Plateau to cultivate millet, their primary food source.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/1lhQyugblIw/150429090110.htm
