To become a desert, the Sahara took its time
By Emma Chartier • June 2nd, 2008 in 22:01
Several thousand years were needed so that the Sahara becomes such as it is known today. It is what reveals the analysis of sediments taken in the bottom of the lake Yoa, in Chad, by Stefan Kröpelin of the university of Cologne (Germany). 6 000 years ago, the Sahara was covered with lakes and with a tropical vegetation. [...]
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