A section of California's Death Valley is home to a strange phenomenon: Rocks that litter the landscape seem to move on their own, leaving long trails behind them in the cracked, bone-dry clay.
These wanderings have baffled scientists for more than five decades. Nobody has ever caught a glimpse of the stones actually moving, yet move they must, because the rocks' locations, and the trails they leave behind them, change over time.
A group of young scientists is taking a crack at solving the puzzle of this odd desert area known as Racetrack Playa.
http://www.ouramazingplanet.com/280-death-valley-mystery-what-makes-rocks-wander.html
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