Brain size of human ancestors evolved gradually over 3 million years
Study of hominin fossils shows that brain size increased gradually and consistently, driven by evolution within populations, introduction of larger-brained species and extinction of smaller-brained ones
Date:
February 20, 2018
Source:
University of Chicago Medical Center
Summary:
Modern humans have brains that are more than three times larger than our closest living relatives, chimpanzees and bonobos. Scientists don't agree on when and how this dramatic increase took place, but new analysis of 94 hominin fossils shows that average brain size increased gradually and consistently over the past three million years.
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https://www.sciencedaily.com/releases/2018/02/180220212021.htm
