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A new mathematical model, recently published in the prestigious journal Nature, provides a robust framework for how this integration might have occurred. The research, led by scientists like computational chemist Andrea Amadei, proposes that the distinct Neanderthal population gradually disappeared not through a violent conquest, but through a long and slow process of genetic assimilation. As small, isolated communities of Neanderthals encountered expanding groups of Homo Sapiens, interbreeding would have slowly but surely diluted their distinct genetic signature over thousands of years.
This model uses what we know about hunter-gatherer reproduction rates to simulate how these populations interacted. It suggests that even a relatively low rate of interbreeding would have been enough, over generations, to absorb the Neanderthal lineage into the larger Homo Sapiens gene pool. This process might have been accelerated if certain Neanderthal genes provided a survival advantage, such as adaptations for coping with colder Eurasian climates, which would have been beneficial for Homo Sapiens expanding into new territories.