Lost river helped lead early ancestors out of Africa
London: A climate model has suggested that the early humans may have left sub-Saharan Africa behind, by following a vast and fertile river system to the Mediterranean.
For many years, it has been speculated that three now-dry North African rivers may have served as pathways for our early ancestors to leave Africa behind.
These rivers would have supplied our ancestors with food while they travelled to the Mediterranean and then on to the Eurasia.
Hydrologist Tom Coulthard of the University of Hull, UK and his colleagues made the climate model of the last interglacial period to find out how the monsoon rains may have travelled down the trans-Saharan mountains` north face and flowed across the landscape.
Coulthard`s colleague Michael Rogerson said that he found that the most promising of the three re-constructed rivers is the Irharhar, which flowed 800 kilometres due north to humid regions along the Algeria-Tunisia border.
Rogerson also suggested that after reaching the end of the Irharhar, they may have taken advantage of marine resources and walked eastward along the North African coast, and traversed the Nile delta before migrating into the Middle East.
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