Researchers discovered thousands of previously unidentified microorganisms at a depth of about 11,000 metres in the Mariana Trench, in a location known as the Challenger Deep. This is the deepest ...

Scientists sampled fish living in the Pacific's Mariana Trench and trenches in the Indian Ocean. . | Credit: Han Xu et al. (2025) Evolution and genetic adaptation of fishes to the deep sea.

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 ...