For decades, rocks in Death Valley’s Racetrack Playa appeared to move on their own. Scientists have now discovered that thin ...

For more than a century, visitors to a remote California lakebed have stared at long, ruler-straight tracks etched into the mud and wondered how heavy boulders could apparently glide on their own. The ...

In one of the hottest and driest parts of the world, there is a phenomenon that is most unexpected. At a remote dry lake bed in the world-famous Death Valley area in the United States, large rocks are ...