# The Mystery of the Bladder; Falling Fertility Rates | Robert Sapolsky Father-Offspring Interviews

An episode of [Robert Sapolsky | Father-Offspring Interviews](https://invisiblenetwork.ai/podcast/1782280922), 1 Oct 2026, 32 min.

Audio: https://traffic.megaphone.fm/APO5102041159.mp3

Episode 130 of Father-Offspring Interviews. Topics in this episode include the worldwide falling fertility rates, and whether this is a concern for humankind, as well as the theories as to why we have this mysterious thing called a bladder. Social & Websites Question Submission: https://ha66meqrpqz.typeform.com/sapolsky Instagram: https://www.instagram.com/robert.sapolsky 00:00 Intro 00:00:14 Question 1 (Dropping fertility rates) 00:20:17 Question 2 (Why we have bladders)

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