A single amino acid substitution in a protein causes increased neuron production in the frontal lobes of humans compared to Neanderthals—a tiny difference that could have given our species a cognitive edge, researchers say.
Researchers found the relatively high proportion of DNA from a hominin cousin—nearly 5 percent—when they scanned more than 1,000 genomes from 118 distinct ethnic groups.
A selective advantage may have led the modern human Y chromosome to sweep through the Neanderthal population after it was introduced via interbreeding more than 100,000 years ago.
Researchers’ simulations suggest that small population sizes and inbreeding made Neanderthal populations vulnerable to chance fluctuations in population size.
Interbreeding with Neanderthals appears to have reintroduced genetic sequences related to innate immunity that had been lost as humans migrated out of Africa.
A new analysis of stalagmites stacked deep within a French cave suggests that the ancient hominin was capable of planning and carrying out construction projects.