Death Valley's Sailing Stones
Images of a moving rock, from time-lapse video. Source: Figure 1, Sliding Rocks on Racetrack Playa, Death Valley National Park: First Observation of Rocks in Motion. doi:10.1371/journal.pone.0105948.g001

Images of a moving rock, from time-lapse video.
Source: Figure 1, Sliding Rocks on Racetrack Playa, Death Valley National Park: First Observation of Rocks in Motion. doi:10.1371/journal.pone.0105948.g001