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    • Why the US can't send humans to Mars

      Why the US can't send humans to Mars

      Business Insider via Yahoo News· 7 days ago

      Just a year later, though, NASA's administrator tasked the astronaut Sally Ride with laying out the agency's future space explorations. In her report,...

    • Do the Planets Ever Actually Align?

      Do the Planets Ever Actually Align?

      HowStuffWorks via Yahoo News· 3 days ago

      If you imagine the eight major planets in a single line stretching out from the sun, this alignment occurs roughly every 13.4 trillion years. And our...