Full video from The Long Now Foundation available at: http://fora.tv/2014/06/10/Civilizations_Mysterious_Desert_Cradle\n\nClimate scientist at the University of Cologne Stefan Kröpelin presents his findings of sediment from the Ounianga Lakes that shows every seasonal climate for the past 11
ગુજરાતી 
Saharan Lake Shows Climate Change For Past 11
