Human Evolution: Bigger Brains, Smaller Faces
A new study published in Nature Communications challenges the long-held belief that human brain growth and facial reduction were driven primarily by natural selection. Researchers suggest these evolutionary changes may have been slower and less directed than previously thought.
Why it matters
This research forces a re-evaluation of fundamental theories regarding human evolution and the drivers of our species' physical development.
A new study, published on July 6,2026 in the journal Nature Communications, suggests that two of the best-known trends in human evolution - brain growth and the reduction in the size of the face and jaw - may be far less attributable to directed natural selection than scientists have long assumed. Instead, the findings by researchers at the University of Tennessee-Knoxville and the Senckenberg Centre for Human Evolution and Palaeoenvironment (SHEP) at the University of T bingen point to a slower and presumably more limited evolutionary process than the traditional textbook portrayal suggests.
Scientific reporting based on peer-reviewed research.
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