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Science
Avatar director vows to return for Amazon tribe fight
Film director James Cameron said Sunday he will return to Brazil this year to make a 3D film on indigenous people of the Amazon who oppose construction of a huge dam for fear it could flood tribal lands.  more
Sceptical green urges smart billions to fight warming
Bjoern Lomborg, the bad boy of the climate debate who has rejected for years "alarmist" prophecies from environmentalists, stresses in a new book the need to invest billions to fight global warming.  more
Technical glitch grounds homemade Danish rocket
The first launch attempt of a homemade rocket built by two Danes failed on Sunday because of a technical glitch, according to Danish media.  more
Focus of Gulf oil disaster shifts to finding the culprit
With a key piece of evidence raised from the depths of the Gulf of Mexico and BP\'s Macondo well ruled a threat no longer, the focus shifts to what went wrong and who is to blame.  more
French science vessel sails again on climate voyage 
The French yacht Tara left on Sunday on the second leg of a three-year expedition across the world\'s oceans to chart the effects of climate change on micro-organisms that produce half our oxygen.  more
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