Thin Ice and Light Winds Move Death Valley's Sailing Stones
Scientists confirmed how the famous sailing stones at Racetrack Playa move: during a rare winter, a shallow pond freezes into a 3–6 mm ice sheet that cracks into panels; a light breeze pushes these panels, sliding heavy rocks across the mud at a walking pace. The 2013–2014 study installed a weather station, time-lapse cameras, and GPS loggers, capturing major moves (one rock ≈65 m in 16 minutes; total trails up to 224 m) and showing that movement is episodic and dependent on precise conditions, while older theories of hurricane winds or thick ice are unlikely. The finding explains many trails, though not all on the playa, and highlights how subtle forces can shape dramatic landscapes.
