In 1997, scientists detected a strange, ultra-powerful sound echoing across the Pacific Ocean that would become known as the "Bloop." The mysterious low-frequency noise traveled thousands of miles underwater, leaving researchers baffled and fueling wild theories about giant sea creatures lurking in the deep.
The sound was recorded by underwater microphones, known as hydrophones, operated by the National Oceanic and Atmospheric Administration (NOAA) during routine monitoring in the South Pacific. What made the signal extraordinary was its sheer strength, allowing it to travel across vast stretches of the ocean without fading like most underwater noises.
