The Mariana Trench (sometimes called Marianas Trench) is a mysterious and extremely deep oceanic trench. Plunging deeper than Mount Everest is tall and stretching five times longer than the Grand ...

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.

The first explorers visited the trench in 1960 on a brief expedition, after which there had been no missions until Hollywood director James Cameron made the first solo trip to the bottom in 2012.

Yet we know very little about their inhabitants, especially on the ocean floor. Since the 1960s, multiple missions—some autonomous, others manned—have sought to explore the deepest part of the Pacific ...

"Insights into surviving the extreme conditions of the Mariana Trench. How to Survive is a Webby Award-winning series offering expert tips for surviving disasters, attacks, and life's toughest ...