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We Don't Need Humans on Mars

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NASA Curiosity rover

NASA's Curiosity Mars rover used the camera at the end of its arm in April and May 2014 to take dozens of component images combined into this self-portrait.

Credit: NASA/Getty

The two mobile robots Spirit and Opportunity were launched from Earth in 2003 and arrived on opposite sides of Mars in 2004. A suite of cameras, instruments, and tools allows them to traverse the landscape for several kilometers, map the area, and drill and analyze rocks.

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