In February, a meteor exploded over Russia's Ural mountains and sent fireballs blazing to Earth, injuring more than 1,000 people. This documentary includes previously unseen footage of what happened as astrophysicists explain exactly what it was, and the likeliness of it happening again. Plus, Nasa's latest plans to deal with a worst-case scenario and what can be done to defend the planet.


Director Andrew Barron

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