3 pages found in
Science and Environment:
Challenger Deep got its name from the British survey ship Challenger II, which pinpointed the deep water off the Marianas Islands in 1951. Also called the Marianas Trench.
http://www.extremescience.com/DeepestOcean.htm
Explore the deepest part of the Pacific Ocean and the deepest location on Earth.
http://www.marianatrench.com
Environmental information and statistics, including details for individual islands in the group.
http://islands.unep.ch/CLY.htm