One might call the freakish happenings in Death Valley National Park extraterrestrial. Let’s be honest, though, if alien-like activity was happening outside of the desert, that would be weird. Stones that mysteriously move across the desert floor seem like appropriate desert activity.

These “sailing stones” have stumped scientists for nearly a century and although alien and super strong breeze theories have been tossed around, science can’t lose its reputation for being factual and legitimate by putting forth erroneous theories about aliens.

The rocks, which range from six to eighteen inches in diameter, move left, right, backwards, forwards, and even do the hokey pokey (because that’s what they’re all about), but they never travel in straight lines. Nobody has ever witnessed this phenomenon, primarily because the rocks only move once every three years. Catching a rock in the act would be like Tom finally catching Jerry.

A few years ago, scientists narrowed their theories down to one hypothesis. Ice floes form around the rocks in specific locations and help them glide across the desert like a youngster helping a senior citizen cross a street. A more recent study (and this seems very appropriate, given the current drought) trumps the old theory. Scientists proposed that the trails the rocks leave behind are related to the water depletion in Death Valley.

Something happened in 2013 that was very upsetting: someone stole these magical rocks. Did they bother to care that some of the rocks had names? How else could scientists monitor their movement? Karen, Nancy, and Mary Ann’s whereabouts are still unknown. Know more.