Rock types
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Content last updated: 27/03/2008
You need the Flash Player (version 6 or higher) to view this - download Flash.
Content last updated: 27/03/2008
Is the next great extinction being foreshadowed by amphibians in decline?
Gregg Wallace gives us his view on the future of food in the credit crunch - do you fancy a luxury pudding?
Chancellor Lord David Puttnam looks to the future in The Open University 40th anniversary lecture.