A helicopter for Mars and four other audacious concepts for space exploration

Image credit: NASA/JPL-Caltech Not even 12 miles. That’s how far NASA’s beloved Curiosity rover has traveled across the surface of Mars in its six years at the Red Planet. It’s time for a marscopter. NASA has announced that a Mars Helicopter, a small autonomous rotorcraft, will travel with the agency’s Mars 2020 rover mission as …

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