Death Valley's Moving Rocks — A Seventy Year Mystery, Solved

At Racetrack Playa in Death Valley National Park, hundreds of heavy dolomite boulders sit at the end of long, carved tracks in the sunbaked mud. Some weigh up to seven hundred pounds, yet they travel across a surface so flat that there is no slope or watercourse for gravity to work with. For decades, researchers argued over how these stones moved without leaving a single human footprint or machinery mark behind. The mystery was finally broken when cousins Richard and James Norris launched the Slithering Stones Research Initiative alongside planetary scientist Ralph Lorenz. After fitting fifteen rocks with custom GPS units and waiting years in the desert, they captured history on camera during the winter of twenty thirteen. Rain flooded the playa, freezing overnight into thin windowpane ice. As the morning sun cracked the sheet into floating panels, a gentle breeze pushed the ice directly against the stones, sliding them across the slick mud at a slow, creeping pace. Video Timestamps: 0:00: The One Minute in a Million Mystery 0:34: Heavy Boulders on a Completely Flat Lake Bed 1:45: Decades of Magnetic and Wind Theories 2:52: The Slithering Stones Research Initiative 4:01: Rigging Death Valley Rocks with Custom GPS Units 4:34: Two Rival Teams Discover Each Other on a Lone Pole 5:19: The Historic Winter Storm of December 2013 6:08: The Unexpected Physics of Thin Windowpane Ice 7:14: The Goldilocks Conditions Required for Motion 8:05: First Observation of Rocks in Motion Scientific and Historical Insights: - Racetrack Playa Geography: The ancient lake bed stretches three miles in length and remains almost perfectly level, offering no natural slope or watercourse for gravity to act upon. - Extreme Rarity: Planetary scientist Ralph Lorenz calculated that the rocks move for roughly one minute out of every million, requiring a rare combination of rain, freezing temperatures, and mild wind. - Custom GPS Tracking: In 2011, researchers drilled cavities into fifteen boulders to insert custom battery powered GPS units alongside time lapse camera rigs and a high resolution weather station. - Windowpane Ice Mechanism: Movement occurs when shallow water freezes into sheets between three and six millimeters thick. As sun melts the ice into floating panels, light breezes of four to five meters per second push the sheets directly against the stones. - Creeping Velocity: Rocks slide across the mud at speeds of two to five meters per minute, moving far slower than a casual walk across distances as long as two hundred twenty four meters.