Saharan Lake Shows Climate Change for Past 11,000 Years

Egypt's pharaonic civilization rose on the Nile, but it was rooted in the deep Saharan desert and pushed by climate change, says Stefan Kröpelin. Described in Nature magazine as "one of the most devoted Sahara explorers of our time," Kröpelin has survived every kind of desert hardship to discover the climate and cultural history of northern Africa.  

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