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  1. NASA's Kepler Mission Discovers Its Smallest Habitable Zone Planets

    NASA's Kepler Mission Discovers Its Smallest Habitable Zone Planets

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  2. Scientists Discovered Planets Even Better for Life Than Earth

    Scientists Discovered Planets Even Better for Life Than Earth

    59
  3. Scientists Discovered Planets Even Better for Life Than Earth

    Scientists Discovered Planets Even Better for Life Than Earth

    14