Sweat’s function is to cool the body without stopping running. Most animals don’t have sufficient excess food and water to “invest” into distance running. Only a super-predator like humans can afford such input cost.
https://en.wikipedia.org/wiki/Persistence_hunting
“Humans are the only surviving primate species that practises persistence hunting. In addition to a capacity for endurance running, human hunters have comparatively little hair, which makes sweating an effective means of cooling the body.”
Latest Answers