At this depth, there is also no light, and if a strong light is brought down, it can penetrate only about 65 feet, so sonar must be used to navigate, Brizzolara said.

Seventy-one percent of the planet is covered by ocean. If we were to make an elevation average of the Earth’s surface, we’d ...

Ocean depth chart shows just how difficult rescuing the Titanic sub really is ... At this depth, the pressure is some 5,800 pounds per square inch – 390 times more than up top ...

A new study finds that the shape and depth of the ocean floor explain up to 50% of the changes in depth at which carbon has been sequestered there over the past 80 million years.

A new study finds that the shape and depth of the ocean floor explain up to 50% of the changes in depth at which carbon has been sequestered there over the past 80 million years.