Saturday, April 6, 2013

Sahara went from green to desert in a flash
[ Fri, 05 Apr 2013 21:48:18 GMT ]
By Becky OskinLiveScienceFrom lakes and grasslands with hippos and giraffes to a vast desert, North Africa's sudden geographical transformation 5,000 years ago was one of the planet's most dramatic climate shifts.The transformation took place nearly simultaneously across the continent's northern half, a new study finds. The results will appear in an upcoming issue of the journal Earth and Planetar...

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