#21: The Acoustic Vibration of the Sailing Stones (Death Valley)
Racetrack Playa in Death Valley holds a mysterious geological phenomenon: large boulders that move across the lakebed, leaving tracks behind without any visible means of propulsion. Recent studies revealed that a rare combination of winter rain and thin ice can create the ideal conditions for these stones to slide silently across the surface. However, it is still unknown what mechanics underlie this low-friction phenomenon.
