Comets: Unstoppable Force (2006)Running Time: 60 minutes (approx)Production Year: 2006Earth teems with life, but imagine it disappearing in one go, the victim of a catastrophic event that leaves the planet uninhabitable. Could a comet impact wipe out all life on Earth? When is Comets: Unstoppable Force next on TV?
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Comets: Unstoppable Force is a Scientific Documentary programme that first aired in 2006.
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In the UK... it's next showing on National Geographic 
United States
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