A DIFFERENT SAHARA DESERT , IN THE PAST : MORE THAN 1 0 0 MILLION YEARS BACK , MUCH OF SAHARA WAS COVERED WITH WATER . THAT IS WHY SCIENTISTS THOUGHT THAT THE SAND IN THE DESERT WAS LEFT THERE BY THE SEA WATER WHICH DRIED AWAY SLOWLY . BUT NOW , IT HAS BEEN FOUND OUT THAT THE SAND OF SAHARA IS NOT THAT OLD . ONLY A MILLION YEARS AGO , SAHARA WAS MOIST ; FULL OF RIVERS , TREES AND GRASS . BUT WHEN THE ICE AGE ENDED ABOUT HALF A MILLION TEARS AGO , CLIMATE GREW HOTTER AND DRIER . THE SOIL GRADUALLY DRIED OUT AND LATER ON WAS ERODED BY WIND . RAW OIL AS FUEL , EXTRACTED FROM DIFFERENT REGIONS OF SAHARA PROVES (BURRIED__TRANSFORMED) PLANTS AND ANIMAL, ONCE COVERED VAST TERRAIN .
Posted on: Mon, 25 Nov 2013 14:53:14 +0000
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