If you listen closely, you’ll find that the earth is full of sounds. Some are things that you hear every day, some are truly remarkable and some sounds hail from origins completely unknown. What follows here is a list of “sonic mysteries” for your pleasure – many of them include audio.
1. The Bloop
At various times during the summer of 1997, an ultra-low frequency sound that rose rapidly in frequency over about one minute was detected at 50 degrees S, 100 degrees W. The sound was detected by the US National Oceanic and Atmospheric Administration with the Equato
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