S2-5 The Science of Tits

Ever wondered why mammals are called mammals? Spoiler: it’s all about the milk. In this episode of Sciencetits, we venture into the evolutionary origins of the mammary gland. We trace the timeline back to when glands first started secreting nutritious goo and as the theory goes not just for offspring, long before marketing made cleavage a cultural phenomenon.

Where did milk come from? Turns out, it wasn’t invented by cows—it likely began as a skin secretion to keep eggs moist (talk about multitasking). Over millions of years, evolution said, “Let’s make this dinner, for the kids” and voilà: lactation.

But here’s the kicker—why do humans have breasts that stick around even when we’re not nursing? Most mammals only flaunt them during feeding season. We explore theories ranging from sexual selection (thanks, Darwin) to fat storage and signaling fertility.

It’s science, it’s history, and yes, it’s a little cheeky. Tune in for an episode that proves evolution has a sense of humor—and a soft spot for mammary innovation.

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Content outlined and presented by Brenda Finney and Frances Hall.

Music from audiojungle.net – Konstantin Kasyanov

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