The Evolution of Human Body Hair

Some of our early ancestors shared this landscape with big, dangerous predators like these lions. Now, lions usually hunt at night when it's cooler and they have really good night vision. So during the day, but wouldn't it be too hot? I've seen museum exhibits of some of our early human relatives, and they were pretty hairy,. It would be like hanging out in the sun with a sweater on. Exactly. And chimpanzees like shady forests and don't spend a lot of time in direct sunlight. They do have sweat glands, and they sweat a bit, but they mostly pants to keep themselves cool, like dogs and other mammals. Champs are just too hairy for sweating to work well