Strange underwater noises, known as “biotwang” sounds, have puzzled scientists since they were first heard near the Mariana Trench in 2014. These odd noises, described as a combination of low grumbling and high-pitched metallic ringing, are reminiscent of eerie sounds from sci-fi movies. For years, the source of these noises was unknown, though they were suspected to be connected to marine life. A recent study has now confirmed that Bryde’s whales (Balaenoptera edeni) are responsible for making these unique sounds. Researchers believe the whales may use these noises as a way to communicate across the vast ocean. Biotwang discovery and analysis The biotwang noises were initially recorded by underwater gliders during an acoustic survey of the Mariana Trench as per a study published in the journal Frontiers in Marine Science. Scientists struggled to identify the origin of these unusual sounds. In 2016, researchers proposed that the sounds likely came from large baleen whales like blue whales or humpback whales, though they could not be certain at the time. It wasn’t until 2023 that the source …