The deepest part of the ocean is the Challenger Deep, which is located in the Mariana Trench in the western Pacific Ocean. The depth of the Challenger Deep is approximately 36,070 feet (10,994 meters) below sea level. This depth was determined in 2010 by the Deepsea Challenger, a deep-sea submersible, during a manned descent to the bottom of the trench.
It's worth noting that the Challenger Deep is not the only deep trench in the ocean, the Tonga Trench and the Kermadec Trench are also considered among the deepest parts of the ocean.
The Mariana Trench is considered as one of the most hostile environments on Earth, due to the immense pressure and near-freezing temperatures. The pressure at the bottom of the trench is about 8 tons per square inch, or about 1,000 times the atmospheric pressure at sea level. Despite these harsh conditions, scientists have discovered a variety of unique and interesting deep-sea creatures living in the trench, such as the snailfish, the Mariana snailfish, and the Mariana eelpout.
Exploring the deep ocean is a challenging task, and scientists still have much to learn about this remote and mysterious part of our planet.