The odd sounds, described as "biotwang" noises, sound a bit like sci-fi starships ... gliders to carry out an acoustic survey ...

Mysterious noises have been coming from the Mariana Trench, the deepest ocean trench, since 2014. Scientists now finally know ...

In 2014, scientists first heard a unique sound coming from the waters around the Mariana Trench. Experts weren't sure what it was, but now a team of researchers led by Oregon State University have ...

Following is a transcript of the video. Narrator: The Mariana Trench is the deepest point on Earth. So deep that if you dropped Mount Everest inside, its peak would still be more than a kilometer ...

Only a handful of people have ever visited the bottom of the Mariana Trench, a crescent-shaped depression ... samples and sonar “eyes” that use sound waves to identify surrounding objects ...