Reconstructing climatic variations over two hundred millennia in East Africa helps learn more about the living conditions of Homo sapiens at the time they migrated from the African continent. To find out, scientists used a computer to analyze data from a lake sediment core in southern Ethiopia. This area is located near the remnants of human camps in the said region. An article about this has been published in Nature Communications.
A group of scientists from around the world, led by Dr. Frank Schaebitz has reconstructed the climatic conditions in Ethiopia over the past two hundred millennia. That is, scientists now have information about the time when Homo sapiens began migrating to Eurasia. Researchers have reconstructed the approximate dating, using data obtained from lake sediment cores found in the area.
Analysis of the cores showed that between 200,000 and 125,000 years, the climate in the lowlands of East Africa was very humid, which meant plenty of water as well as plenty of available food. Then, between 125 and 60 millennia, the region became more arid, peaking between the 60th and 14th millennia.
The resulting climate model fits nicely with the theory created by geneticists’ research that Homo Sapiens migrated from the African continent during the Wet Period, about 70 millennia ago.
“We hypothesize that the evidence of temperature fluctuations in the dry and wet climates of East Africa found in our drill core had a significant impact on the evolution and mobility of our ancestors,” Schebitz said. – “Migration from Africa was possible several times during the last 200,000 years, during periods of wetter climate, and led to the spread of our ancestors throughout Europe.”