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A mysterious duck-like sound recorded in the ocean around Antarctica has baffled scientists for decades, but the source of the sound has finally been found, researchers say.
For more than 50 years, researchers have recorded the so-called "bio-duck" sound in the Southern Ocean. Submarine crews first heard the oceanic quack, which consists of a series of repetitive, low-pitched pulsing sounds, in the 1960s.
If It Quacks Like a Duck, It Might Be a Whale - NBC News
For more than 50 years, researchers have recorded the so-called "bio-duck" sound in the Southern Ocean. Submarine crews first heard the oceanic quack, which consists of a series of repetitive, low-pitched pulsing sounds, in the 1960s.
If It Quacks Like a Duck, It Might Be a Whale - NBC News