The chillest ape: How humans evolved a super-high cooling capacity

Researchers have discovered how a uniquely high density of sweat glands evolved in the human genome. Researchers showed that the higher density of sweat glands in humans is due mostly to accumulated changes in a regulatory region of DNA -- called an enhancer region -- that drives the expression of a sweat gland-building gene, explaining why humans are the sweatiest of the Great Apes.