For years, a strange and unsettling noise coming from the Mariana Trench, the deepest part of the ocean, puzzled scientists.

Researchers from Cardiff University have discovered a signal which could help identify the resting place of the Boeing 777 ...

Researchers long believed sharks to be silent animals based on their anatomy, but unprecedented evidence shows the rig shark ...

But for the Blue Planet II sound team, the challenges of portraying natural underwater soundscapes are many. Contrary to Cousteau’s notion of ‘the silent world’, the oceans are alive with sound.

Some days the high-speed news cycle can bring more questions than answers. WSJ’s news explainers break down the day's biggest stories into bite-size pieces to help you make sense of the news.

A new photo series explores the magic and beauty of an underwater universe, with incredible and detailed imagery of elusive marine life. The winners for the Underwater Photographer of the Year ...