Ologies with Alie Ward cover image

Mammalogy (MAMMALS) with Danielle N. Lee

Ologies with Alie Ward

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The Evolution of Nipples

Zac Efron is a member of the triple nipple brigade. Harry Styles isn't because he has four nipples. About one in 500 humans have bonus nipples. One theory is that as humans evolve to walk upright and our derriere areas were less swollen in estrus, there needed to be an indicator of sexual maturity.

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