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A new mathematical model has explored a fascinating scenario in which Neanderthals gradually disappeared not through"true extinction" but through genetic absorption into a more prolific species:interbred was a radical notion, and yet now, modern genome studies and archaeological evidence have provided strong evidence that our two lineagesAmadei and co-authors – evolutionary geneticist Giulia Lin from the Swiss Federal Institute of Aquatic Science and Technology, and ecologist Simone Fattorini from the University of L'Aquila in Italy – present a model that does not rule out these other explanations.
It does suggest that genetic drift played a strong role – even with the researchers assuming the Neanderthal genes our species 'absorbed' had no survival benefit.Like all models, this new one is based on imperfect assumptions. It uses the birth rates of modern hunter-gatherer tribes to predict how quicklyAs each wave of migration came crashing into the region, it engulfed local Neanderthal communities, diluting their genes, like sand pulled into the sea.
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