When disaster leaves only a handful, can a civilization restart? We explore genetic bottlenecks, colony failure, and the limits of survival.

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Credits:
Genetic Bottlenecks – How Few People Can Start a World? Or Restart One?
Written, Produced & Narrated by: Isaac Arthur
Select imagery/video supplied by Getty Images

Chapters
0:00 Intro
10:56 Restoration
19:26 Practical Engineering