Mysterious Roving Rocks of Racetrack Playa

The rocks are famous because they move, leaving tell-tale trails in the clay, like this one. This happens at several playa in California and Nevada. There's no record of anybody seeing one of the rocks move, and scientists aren't quite sure how it happens. But they know that it's not the work of animals, gravity, or earthquakes.

Photo credit: NASA/GSFC/Cynthia Cheung

To read a feature story on the Racetrack Playa go to: www.nasa.gov/topics/earth/features/roving-rocks.html

NASA Goddard Space Flight Center is home to the nation's largest organization of combined scientists, engineers and technologists that build spacecraft, instruments and new technology to study the Earth, the sun, our solar system, and the universe.

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