Archive for April, 2011

Theories for Hairlessness in Humans: Sexual Selection, Savannah / Thermoregulatory Hypothesis, Aquatic Ape Theory, Ectoparasites

Like bipedalism, relative hairlessness is one the defining and conspicuous characteristics of human beings. Explanations for why hairlessness arose are numerous, and include sexual selection (which Darwin favoured), the Savannah/Thermoregulatory Hypothesis, the Aquatic Ape Theory (AAT / AAH), as well as ectoparasites. Of these, only sexual selection offers true insight into why the loss of […]