Monday, February 11, 2013
In the summer of 1997, an array of underwater microphones, or hydrophones, owned by the US government picked up a strange sound. For a minute, it rose rapidly in frequency; then it disappeared. The hydrophones, a relic of cold-war submarine tracking, picked up this signal again and again during those summer months, then it was never heard again. No one knows what made the sound, now known as "The Bloop". Its origin has been only loosely pinned down: it seems to have originated from somewhere off the west coast of South America, and could be heard from 2000 kilometres away. The Bloop sounds like it has been created by an animal, but it is far louder than any whale song. The marine creature that made it would be many times bigger than any whale.