The Mystery of the Bladder; Falling Fertility Rates | Robert Sapolsky Father-Offspring Interviews
Oct 1, 2026 · 31m
Summary
Robert Sapolsky debunks the Malthusian overpopulation myth, explaining how global fertility rates have plummeted to replacement levels without predicted chaos, and discusses the economic consequences of aging populations. He also answers a listener's question on the evolutionary logic of bladders, covering predator avoidance, water retention, and the universal 21-second urination duration across mammals.
Topics discussed
Sponsor: Total Wine & More and Sustain Pro
Introduction to Father Offspring Interviews
The Malthusian Collapse Myth and Brooklyn Childhood
Global Fertility Rates and Replacement Levels
Failed Policy Interventions: Romania and South Korea
Declining Fertility in the Developing World
Causes of Decline: Cost, Pollution, and Antinatalism
Sponsor: Total Wine & More and Sustain Pro
Consequences: Aging Populations and Economic Collapse
Paul Ehrlich, The Population Bomb, and His Legacy
US Demographics and the Role of Immigration
Listener Question: Evolutionary Logic of the Bladder
Hypothesis: Bladders Prevent Predator Tracking
Water Retention and Hibernating Bears
Social Scent Marking and Voluntary Control
Stress Responses and Bladder Emptying
Kidney Adaptations in Camels and Whales
The 21-Second Urination Rule and Ignobel Prize
Human Bipedalism and Bladder Physiology
Sponsor: End Family Fire and Apple Watch
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