Page last updated at 12:39 GMT, Tuesday, 21 September 2010 13:39 UK

Are solar flares a real threat?

Defence Secretary Liam Fox has highlighted warnings from scientists that essential infrastructure could be paralysed by a once-in-a-century solar flare.

Newsnight's Science editor Susan Watts considers how much we really need to worry about the warning and the possibility of life without electricity.

Broadcast Monday 21 September 2010.


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