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Originaly aired 2-hour program
If we faced a countdown to destruction, could we find a way to survive? In a series of terrifying scenarios, Nat Geo explores how we could unite to ensure the survival of the human race.
The dangers posed by nano-robotics and how this exciting technology could, in the wrong hands, wipe out civilization.
Could humanity survive if the planet were ravaged by a bizarre and deadly weather phenomenon? There may be hope if we can adapt to a new Earth.
Explore the terrifying consequences of flash floods and rising sea levels as experts explain how a massive volume of water might come to earth from space.
Is a zombie apocalypse simply a concept of fiction or could an infectious disease actually turn humanity into a race of vicious monsters? The truth just might shock you!
What would happen if all of the world’s volcanoes erupted at the same time? Explore the very real, and very deadly, science of volcanic activity.
What might happen if a strange dark force pulls earth from its orbit and sends us drifting out into the deadly darkness of space?
