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Jack and Jill, the famous nursery rhyme couple, have come a long way since their tumble downhill. Today they’re part of NASA’s deep space human exploration program, serving as simulated stand-ins for the men and women who will work inside

You don’t need a powerful telescope to see the deep reddish glow of Mars. It’s easily spotted through binoculars and, on clear nights at certain times of the year, with the naked eye. The ancient Romans revered the planet for