Series 1 Episode 1
First Broadcast: 8PM Sun 3 March 2013

In February a meteorite bigger than a double decker bus, travelling at 40,000 miles an hour, crashed into planet Earth. This film shows previously unseen footage of what happened.

Astrophysicists explain exactly what it was and reveal how likely it is to happen again.

The programme also hears NASA's latest plans to deal with the worst-case scenarios and what can be done to defend our planet.

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Meteor Strike: Fireball from Space on Channel4.com

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What's the likelihood of Earth being struck by another meteorite like the one in Russia? And what can be done to protect our planet?