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RSSCosmic gamma-ray bursts occur several times a day. Having the extreme brilliance of a billion Suns, the bursts are considered the most powerful explosions in the universe. two types of gamma-ray bursts exist-the long ones that last for tens or hundreds..
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The bulge of our galaxy is an intense source of gamma-ray line, indicating the production of a large number of positrons that annihilate. A controversial study of...
made popular Dec 10 2006
Scientists and science-fiction authors have long dreamed of turning Mars into a more Earth-like planet for future human colonists. Now the scientists are investigating...
made popular Nov 15 2006
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