Evacuate Earth

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In a doomsday scenario, the race is on to escape annihilation.If we had 75 years warning, would humankind be capable of evacuating the planet? This programme examines how you could flee your home habitat: from building a 25km-long spaceship capable of travelling trillions of kilometres to deciding which unlucky souls get left behind. Go with National Geographic Channel on a mission to Evacuate Earth.