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Humans' Big Brains Tied To Chimps' Immunity?

Scientists at Stanford argue that the same genes responsible for immunity in chimps may also be the reason humans have such big brains. Above, a young chimpanzee at Sydney's Taronga Zoo.
Scientists at Stanford argue that the same genes responsible for immunity in chimps may also be the reason humans have such big brains. Above, a young chimpanzee at Sydney's Taronga Zoo.