Why Mammals Gave Up On Laying Eggs

Описание: So… Why don’t we lay eggs? 🥚

Most animals on Earth do: most invertebrates, including most insects, most fish, most amphibians, most reptiles, all birds and even a few mammals lay eggs to reproduce. So what about us? Why did our ancestors ditch the shell and start growing babies inside their bodies instead?

In this episode of Big Ideas, from the team behind Deep Look, Niba zooms out to explore one of evolution’s biggest plot twists: how eggs evolved, how they conquered land, and why most mammals — including us — moved on to live birth.

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---+ Find a transcript on KQED Science:
www.kqed.org/science/2000271/why-mammals-gave-up-on-laying-eggs

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