

Deep Look
12 Seasons · 217 Episodes
Latest episode
Here’s Why Humans Can’t Lay Eggs
Season 12 Episode 20 | 9m 51s | CC
Why do most animals lay eggs, while humans and most mammals give birth to live young? In this episode of Big Ideas from the team behind Deep Look, host Niba explores how eggs first evolved, how they helped animals conquer life on land, and why most mammals eventually shifted from laying eggs to growing babies inside their bodies.
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