The Evolutionary Benefits of Hair Texture for Early Humans.

A team of scientists has discovered a connection between hair texture and the expansion of the human brain, dating back approximately 2 million years. By testing various wigs on a specially designed dummy exposed to solar radiation in a wind tunnel, researchers have unraveled a hidden connection between hair texture and the expansion of the human brain. The study sheds new insights about how human hair textures affect regulation of body temperature. The researchers concluded that tightly curled hair provided the best protection from the sun’s radiative heat while minimizing the need to sweat to stay cool.