The world is overdue a ferocious 'space storm' that could knock out communications satellites, ground aircraft and trigger blackouts - causing hundreds of billions of pounds of damage, scientists say.
Astronomers today warned that mankind is now more vulnerable to a major solar storm than at any time in history - and that the planet should prepare for a global Katrina-style disaster.
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For those who might have forgotten what made the Katrina disaster so disastrous.
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