Neanderthals might not have completely vanished from our world. Recent research suggests that instead of becoming extinct, they were absorbed into our species, Homo sapiens.
A new mathematical model studied how Neanderthals could have merged genetically with humans over 10,000 to 30,000 years. Researchers, including computational chemist Andrea Amadei from the University of Rome, argue that this gradual mixing explains the decline of Neanderthals. They point to modern genome studies showing that people of non-African descent carry about 1 to 4 percent Neanderthal DNA.
Historically, the idea of Neanderthal and human interbreeding was controversial. But now, a wealth of archaeological evidence supports the idea that these two species coexisted and reproduced across Eurasia for tens of thousands of years.
Experts agree that Neanderthal extinction—about 40,000 years ago—was likely influenced by various factors. Environmental changes, loss of genetic diversity, and competition with Homo sapiens all played significant roles. Yet, this new model emphasizes genetic drift, suggesting that even without any advantages from Neanderthal genes, the larger human population could have absorbed the smaller Neanderthal tribes.
This approach assumes that the birth rates of modern hunter-gatherer groups can be used to estimate how quickly small Neanderthal populations might have been integrated into the larger human society. Recent archaeological finds also suggest a slow decline for Neanderthals rather than a sudden disappearance. Studies indicate that Homo sapiens began migrating out of Africa earlier than previously thought, arriving in Europe in waves, which diluted Neanderthal populations.
Interestingly, many scientists now argue that Neanderthals and humans have more commonalities than differences. They believe that our lineages are better viewed as distinct populations of a single human species. This perspective highlights the adaptability and intelligence of Neanderthals. They crafted complex tools, created cave art, and likely communicated in ways beyond mere grunts.
While Neanderthal cultures may be gone, their genetic influence still exists within us. They are not just our distant relatives; they are part of our ancestral story.
The study detailing these findings appears in Scientific Reports. For more information, you can read the original research here.
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