In the years following the first report of the so-called Bio-Duck in 1960, scientists struggled to explain it.We still don't have a complete answer, but new work analyzing Bio-Duck sounds suggests ...

Since the 1960s, a strange, repetitious quacking noise called a “bio-duck,” which can frequently be heard in the Southern Ocean, has puzzled marine biologists and underwater acoustic experts.

In the Antarctic depths, a sound like a giant duck’s quack echoed, baffling humans since the 1960s. Dubbed the Bio-Duck, its origin sparked decades of mystery, hinting at something otherworldly ...