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RE "....how would hairlessness represent an evolutionary advantage?" It is an evolutionary advantage for the mammals that left the land to live in the sea: whales, seals, etc, (which have different degrees of hairlessness). An out-of-favour theory is that humans made a half-hearted attempt to 'return' to the sea but stopped half-way and …
RE "....how would hairlessness represent an evolutionary advantage?" It is an evolutionary advantage for the mammals that left the land to live in the sea: whales, seals, etc, (which have different degrees of hairlessness). An out-of-favour theory is that humans made a half-hearted attempt to 'return' to the sea but stopped half-way and came back. It is described in The Descent of Woman by Elaine Morgan (approx. 1970s).