Between 1.9 and 2 million years ago, the brain size of our human ancestors increased dramatically. Now a trove of 1.95-million-year-old bone fragments from various animals adds evidence to a theory that these pre-humans owed this brainpower boost to fish.
The fossils, found in northern Kenya, bear cut marks from early stone tools and are the oldest evidence of the consumption of aquatic animals by human ancestors, said study researcher Brian Richmond, an anthropologist at George Washington University in Washington, D.C. The fatty acids found in the fish could have provided the nutrients the hominins needed to evolve larger brains, he said…
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