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Martian Whirlybird
Featured on August 22, 2018
The next Mars rover, scheduled for launch in 2020, will carry a small helicopter, as depicted in this artist's concept. The craft is expected to reach altitudes of up to 1,000 feet and fly up to about 2,000 feet from the rover (shown in the background), which will relay the chopper's findings to Earth. [NASA/JPL]