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Are humans alone in the universe? This question has endured since people first looked to the heavens. NASA is getting closer than ever before to answering that question. Thousands of planets outside of our solar system have already been discovered, and a recently launched NASA satellite called TESS may discover even more. Will any of the thousands of newly discovered exoplanets be like Earth, able to sustain life? Listen to this story to learn how NASA is searching for Earth’s twin.
Story Length: 3:17
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