“Tucked away in California’s Death Valley National Park, the flat basin known as Racetrack Playa is littered with stones that seem to migrate across the landscape. But how do they do it? Brian Jackson describes how he and collaborators Ralph Lorenz and Richard Norris solved a long-standing mystery.” http://physicsworld.com/cws/article/indepth/2015/jul/02/the-restless-rocks-of-racetrack-playa

Thanks to Ralph and Dick for their help with this article. It was a lot of fun to write.