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Content last updated: 25/03/2008
You need the Flash Player (version 7 or higher) to view this - download Flash.
Discover more about studying - and pick up some great studying tips: follow our Open Advice
Content last updated: 25/03/2008
Want to get involved with a massive experiment? Listen as Jimmy introduces the Evolution Megalab.
Do chances of being wiped out by asteroids hitting the Earth exist beyond Hollywood's imagination or is there risk in the skies?
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