For decades, researchers and submarine crews in icy waters off the coast of Antarctica have been picking up a mysterious quacking sound. The "bio-duck," as its called, has been heard on and off since ...

Rosie is a freelance writer living in London. She has covered everything from ancient Egyptian temples to exciting medical breakthroughs, but she particularly enjoys writing about wildlife, ...

In the '60s, submarines picked up a mysterious quacking sound in the Southern Ocean. This "bio-duck," as it came to be known, has been heard on and off ever since, but scientists haven't been able to ...