The Evolution of Nipples

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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.

Mammals: you’re one. Your dog is one. So are giant rats. What do we have in common? Nipples. The incredible Southern Illinois University professor, researcher, science communicator and mammalogist Dr. Danielle N. Lee joins to chat about everything from nature’s parenting styles to hairy bellies, milk glands, nip counts, how a meteor paved the way for our existence, her favorite mammals and the mysteries of the platypus. An episode years in the making, Alie barely keeps her cool as Dr. Lee gives insight and perspective on what it means to be a human and a mammal. Also, we chat about Black Mammalogists week Sept. 13-19 and the important pivots that changed her career path.

Follow Dr. Danielle N. Lee at Twitter.com/DNLee5 or Instagram.com/DNLee5

September 13-19 is Black Mammalogists Week! https://blackmammalogists.com/

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Sound editing by Jarrett Sleeper of MindJam Media & Steven Ray Morris

Theme song by Nick Thorburn