7 Mariana Trench Facts – Deepest, darkest, and most mysterious place on earth

Challenger Deep – The deepest point on earth

The Challenger Deep is the lowest point in the Mariana Trench. With an incredible depth of about 10,994 meters, this part of the ocean is so deep that it is almost inaccessible to humans. It is even deeper than the highest mountain on earth is tall (8,848 meters). The Challenger Deep is named after the HMS Challenger, whose crew first measured the depth of the trench during their expedition from 1872-1876. They sounded with a sounding lead then a depth of more than 8,000 m. In 1951, sonar could be used and a depth of 10,900 m was measured at one place.