““Another possibility is that the sweat glands were the driving force behind the rise of EDAR-V370A. East Asians are usually assumed to have evolved in a cold climate because of certain traits, such as narrow nostrils and a fold of fat over the eyelid, which seem helpful in conserving body heat. But researchers have calculated that the EDAR variant emerged some 35,000 years ago, at which time central China was hot and humid.””
