The Dead Sea in Israel is over 1,400 feet below sea level, but the Challenger Deep is 35,876 feet down at its lowest point.

This frowning creature lives in ocean depths of up to 3,937 feet, where the water pressure is more than 100 times what it is ...

The U.S. push to mine international waters for metals defies global efforts to control and protect these fragile ecosystems.

Favignana, off the west coast of Sicily, is known for its stone quarries, clear waters and fabled fish. A writer explores by ...