S37 E12: The Egg: Life’s Perfect Invention

Aired: 4/10/2019 | 0:53:29 | Expires: 4/10/2023 | Episode
How is an egg made? Why are they the shape they are? And perhaps most importantly, why lay an egg at all? Step by step as the egg hatches, host David Attenborough reveals the wonder behind these incredible miracles of nature.

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