Now, artificial intelligence is helping researchers track the elusive whale species responsible for the sound.The puzzle began in 2014 when researchers recorded a sound resembling a moan followed by metallic sweeping pings over the Pacific Ocean’s Mariana Trench.

A new study has revealed the exact origin of the Pacific Ocean's mysterious "biotwang" noises, which were first detected by underwater surveys near the Mariana Trench in 2014.

An artificial intelligence (AI) tool that’s being compared to “Shazam for whales” has cracked an ongoing mystery at the Mariana Trench. A bizarre sound, source unknown, had been ringing out in this stretch of the Pacific,