What If We Built the World's Deepest Bunker?

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Hundreds of meters underground. Large enough to house tens to hundreds of thousands of people. And walls strong enough to withstand the force of a nuclear blast. These are some of the world's deepest, and largest bunkers. But even in an apocalypse, you wouldn't be completely safe in one of these. Earth-penetrating weapons, like the 1.2 megaton B83 warhead, can demolish bunkers 300 m (1,000 ft.) deep. What would it take to build a deeper bunker? What would life be like inside it? And why can living underground be dangerous?

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What If is a mini-documentary web series that takes you on an epic journey through hypothetical worlds and possibilities. Join us on an imaginary adventure through time, space and chance while we (hopefully) boil down complex subjects in a fun and entertaining way.

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