The most striking environmental shift on the planet in the Holocene epoch was the greening of the Sahara. For thousands of years, the now-deserts of northern Africa were a mosaic of savannahs, river valleys, and shallow lakes. This unique environment produced the ways of life that eventually brought pastoralism and food production, as well as a variety of language families and populations, to the furthest corners of the continent.Patrick's book is now available! Get The Verge: Reformation, Renaissance, and Forty Years that Shook the World in hardcopy, ebook, or audiobook (read by Patrick) here: https://bit.ly/PWverge Listen to new episodes 1 week early, to exclusive seasons 1 and 2, and to all episodes ad free with Wondery+. Join Wondery+ for exclusives, binges, early access, and ad free listening. Available in the Wondery App https://wondery.app.link/tidesofhistory.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.