Why it's incredible: The playa is home to "sailing stones" that seem to move of their own volition. Racetrack Playa is a dry, flat lakebed in California that is littered with hundreds of mysterious, ...

As long ago as the 1940s, the mysterious moving rocks of Death Valley National Park's Racetrack Playa have stumped scientists. How stones as heavy as 35 pounds (16kg) can bulldoze their way across a ...

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 ...

Rachael has a degree in Zoology from the University of Southampton, and specializes in animal behavior, evolution, palaeontology, and the environment. Rachael has a degree in Zoology from the ...

For over a hundred years, the sight of heavy rocks leaving long trails across the parched floor of Death Valley’s Racetrack Playa puzzled observers and scientists alike. In 2014, a team of researchers ...