New research suggests that Neanderthals and early modern humans likely had similar thinking abilities. For a long time, scientists believed that the different shapes of their skulls meant their brains were also different. This led to the idea that Homo sapiens were smarter and outcompeted Neanderthals.
However, a new study challenges this view. It suggests that Neanderthals did not have "significantly different brains and cognitive abilities" compared to early modern humans.
Rethinking Brain Differences
Researchers from universities in China and the United States compared brain differences in modern Han Chinese individuals and Americans of European descent. They found that in nine out of 13 brain areas, the differences between these modern groups were larger than those between Neanderthals and early modern humans.
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Start Your News DetoxThis means that any cognitive differences between Neanderthals and early Homo sapiens would fall within the normal range seen in modern human populations. These variations are not usually considered important for evolution. This finding weakens the idea that Neanderthals disappeared because they weren't as smart.
Tom Schoenemann, an anthropologist at Indiana University and lead author, noted that any average cognitive differences would have been very subtle, if noticeable at all.
Why Did Neanderthals Disappear?
Instead of cognitive differences, the researchers believe other factors led to the Neanderthals' disappearance. They suggest "demography and genetic swamping," possibly due to cultural differences. This means that as Neanderthals and Homo sapiens interbred, the genes of early modern humans gradually became more common. Eventually, Neanderthal genes were absorbed, and they no longer existed as a separate species.
Other theories for their decline include isolation and a lack of genetic diversity. These factors might have made Neanderthals more vulnerable to things like climate change or competition from Homo sapiens.
Evidence of Neanderthal Intelligence
The idea that Neanderthals were as intelligent as early modern humans is not new. Archaeologists have found many signs of their intelligence over the years. These include examples of artistic expression and the development of a sophisticated "fat factory."
Recent research also suggests Neanderthals had the genetic tools for complex language. John Hawks, a paleoanthropologist, said that evidence increasingly shows Neanderthals were "not dumb brutes." He added that they were "recognizably human."
Deep Dive & References
Neanderthal and modern human brain differences were not evolutionarily significant - Proceedings of the National Academy of Sciences, 2024
