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 ...

That a parrot can copycat sounds is nothing new. But vocal learning is not common in animals. Researcher Carel ten Cate of the Institute of Biology Leiden (IBL) of Leiden University has now discovered ...

In the waters around Antarctica, decades ago, humans heard a strange sound: a repeating noise that sounded like the quacking of a duck, if the duck was a giant kraken. In the years following the first ...