Differences in mammalian brain structure and genitalia linked to specific DNA regions in new study

Humans are clearly different from chimpanzees. The question is, why? According to researchers at the Stanford University School of Medicine, it may boil down in part to what we don't have, rather than what we do. The loss of snippets of regulatory DNA, the scientists found, could be the reason why, for example, humans lack the penile spines found in many other mammals, and also why specific regions of our brains are larger than those of our closest relatives...

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