In the remote Racetrack Playa of Death Valley National Park, California, massive boulders—some weighing up to 300 pounds—mysteriously slide across the dried lakebed, leaving perfectly traced trails ...

The world is absolutely jam-packed with mysterious phenomena, some of which have an obvious scientific explanation, others that baffle and confuse onlookers. Of course, everything has a proper ...

This phenomenon has been one of nature’s most intriguing puzzles ...