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Kepler-186f: NASA discovers first Earth-sized planet orbiting in life-friendly zone

By Irene Klotz CAPE CANAVERAL, Florida (Reuters) – For the first time, scientists have found an Earth-sized world orbiting in a life-friendly zone around a distant star. The discovery, announced on Thursday, is the closest scientists have come so far to finding a true Earth twin. The star, known as…

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