Remember that scary undersea "bloop" noise? At last we know what caused it.

Back in the late 1990s, NOAA's Acoustic Monitoring Project recorded a series of haunting, creepy noises from deep beneath the ocean's surface (you can hear it in the audio above). When this recording began to circulate in the media, people went crazy speculating about the sea monsters, secret government experiments,… »11/21/12 9:37pm11/21/12 9:37pm