One small step for man-made machine
This image released by NASA shows tracks made by Curiosity's tires during its first test drive as seen by Navcam on board NASA's Mars rover Curiosity on Sol 16, August 22, 2012. The $2.5 billion rover, which landed on Mars on August 6, has performed a battery of tests and appears ready to embark on its two-year mission to explore the Red Planet in the hunt for signs of life.

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