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NASA's new Earth-bound rover, GROVER, which stands for both Greenland Rover and Goddard Remotely Operated Vehicle for Exploration and Research, in Summit Camp, the highest spot in Greenland, on May 10, 2013. GROVER is an autonomous, solar-operated robot that carries a ground-penetrating radar to examine the layers of Greenland's ice sheet. Its findings will help scientists understand how the massive ice sheet gains and loses ice. After loading and testing the rover's radar and fixing a minor communications glitch, the team began the robot's tests on the ice on May 8, defying winds of up to 23 mph (37 kph) and temperatures as low as minus 22 F (minus 30 C). (Photo by Lora Koenig/NASA Goddard)
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