03/17/2025
We know that 14 other human species once existed.
We, Homo sapiens, are far from the only human species to walk the Earth.
In fact, our closest relatives, the Neanderthals (Homo neanderthalensis), thrived in Europe and West Asia as recently as 45,000 years ago.
Sharing 99.7% of our DNA, they were physically distinct — shorter, stockier, and adapted to cold climates with large nostrils and powerful builds.
Interestingly, Neanderthals had larger brains than early modern humans, yet they mysteriously disappeared. Their extinction likely resulted from multiple factors, including competition with Homo sapiens, climate shifts, and smaller, more isolated social groups.
Unlike Neanderthals, early humans developed complex shelters, diverse hunting techniques, and stronger social networks, which may have given them a survival advantage.
Though Neanderthals vanished, they live on within us. Genetic studies reveal that up to 4% of modern human DNA originates from Neanderthals, indicating interbreeding between the two species. Other ancient human groups, like the Denisovans, also disappeared as Homo sapiens expanded across the globe. While some theories suggest that climate change, diet limitations, or even violent clashes contributed to the Neanderthals' demise, their legacy endures in our genes. As new discoveries emerge, we may yet uncover more secrets about these ancient cousins and their role in shaping human evolution.
learn more https://www.genome.gov/27539119/2010-release-complete-neanderthal-genome-sequenced
