What’s Making this Mysterious Bio-Duck Quack?

A haunting quacking sound echoed through the water, baffling researchers and sparking countless theories for more than 5 decades. Once dubbed as the largest still unresolved mysteries of the Southern Ocean. For years, this auditory riddle remained unsolved, leaving the scientific community both intrigued and frustrated.

It all began in the early 1960s when by a submarine crew who started hearing the sound ring out from the deep - called the Bio-Duck.

Видео What’s Making this Mysterious Bio-Duck Quack? канала Concerning Reality