The old saying that a duck's quack produces no echo is... well, just plain quackers. Daisy performs: The anechoic chamber has no sound reflections Acoustics expert Professor Trevor Cox has deployed ...

Ocean researchers have recorded unidentified "quack" sounds in the sea for years. Credit: Mayehem / Getty Images Both scientists and sailors alike have recorded unique, strange noises in the ocean for ...

Mystery of duck quack sound in ocean finally solved Fir0002 A 50-year-old mystery involving duck quack sounds coming from the ocean has finally been solved by scientists. The strange duck sound was ...

The bizarre noise was first heard 50 years ago but now scientists say the Antarctic minke whale is its source The mystery of a bizarre quacking sound heard in the ocean has finally been solved, ...

A sound like a duck heard in the Southern Ocean has confused scientists for 50 years. But the mystery has now been solved, according to research published in the Royal Society journal Biology Letters.

The mystery of a bizarre quacking sound heard in the ocean has finally been solved, scientists report. The noise - nicknamed "the bio-duck" - appears in the winter and spring in the Southern Ocean.