New research suggests Neanderthal extinction resulted from complex interactions between climate, geography, demography and interspecies dynamics rather than a single cause.
Researchers reconstructed Neanderthal territories using digital tools
A team led by Ariane Burke of the University of Montreal used ethnographic data from better-documented ancient hunter-gatherer groups to model Neanderthal habitats. Their analysis indicated a typical annual territory of about 2,500 square kilometers for local groups of 25 to 50 individuals who moved seasonally and maintained regional links with other groups.
Modern human social networks provided a critical advantage
The study found Homo sapiens populations were better connected than Neanderthal groups, enabling information exchange about resources and animal migrations, partnership formation and temporary access to other territories during crises. These networks acted as a safety net that Neanderthal populations, particularly in central and eastern Europe, appear to have lacked.
Climate played a role but was not the sole factor
The last glacial cycle involved alternating cold (stadial) and warmer (interstadial) periods that both species had to adapt to. Researchers emphasize that while climate stress contributed, it cannot alone explain Neanderthal disappearance around 40,000 years ago.
What does this mean for understanding human evolution?
The findings highlight social connectivity as a potential key factor in the survival advantage of early modern humans over Neanderthals during their coexistence in Europe.
How did researchers estimate Neanderthal group territories?
They combined archaeological traces and ethnographic data from documented hunter-gatherer groups with modern species distribution models to simulate ancient human landscapes.
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