Oh. Boy. A mystery solved. http://bit.ly/XTHWLy Death Valley’s bizarre moving rocks have stumped visitors and scientists for decades. Boulders of black dolomite appear to move on their own across the playa’s flat lakebed, even sliding uphill. No one saw them move – their trails are the only evidence. Now they have been observed. Gentle winds slide the rocks across thin, ephemeral sheets of ice. Many years may pass until conditions are right. “A series of wet winter storms created the perfect conditions from December 2013 through February 2014. Hundreds of rocks scooted across Racetrack Playa five times in 10 weeks…It’s a wonderful Goldilocks phenomenon.”