In Antarctica, a signal like this recently seemed to materialize out of nowhere, but it wasn’t coming from the sky above—instead, it was coming from the depths of the ocean. Two decades ago, far above the vast expanse of ice and snow,

Mysterious radio signals detected emanating from Antarctica's ice have left particle physicists baffled. The pulses were detected by the Antarctic Impulsive Transient Antenna (ANITA)—an array of radio instruments flown high above the southernmost continent via air balloon.

A cosmic particle detector flying high over Antarctica picked up a series of strange radio signals that appeared to be coming from below the ice - something current particle physics says shouldn’t be possible.