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Alien life could be rarer than believed warn asteroid spotters
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The possibility of complex alien life elsewhere in the universe could be rarer than previously thought, researchers have warned, with asteroid belts considered near-vital for evolution-spurring proving in short supply. Although the centerpiece of disaster movies such as Deep Impact and Armageddon, asteroids are also believed to act as a catalyst to life, delivering water and chemicals to planets as well as punctuating species development through periodic impacts. That’s a fine balance to be made, however, researchers at the University of Colorado argue, and it demands a particular – and uncommonly found – type of asteroid belt to be present. [ link to www.slashgear.com]
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