US researchers have claimed to have discovered a planet similar to Earth some 15 light years away. . .
“This planet answers an ancient question. Over 2,000 years ago, the Greek philosophers Aristotle and Epicurus argued about whether there were other Earth-like planets. Now, for the first time, we have evidence for a rocky planet around a normal star,” said team leader Geoffrey Marcy, professor of astronomy at the University of California, Berkeley.
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