The ocean is home to all manner of mysteries, from “alien” shape-shifters to ancient shipwrecks. And so, when Richard Branson and a team of scientists took a submersible down to the bottom of Belize’s ...

This 2011 astronaut photo shows the atolls of Rowley Shoals lined up in a near-perfect line off the coast of Australia. The ...

Alligator Reef, marked by its historic lighthouse, provides a window into an aquatic wonderland where parrotfish nibble on coral, nurse sharks rest on sandy bottoms, and schools of silver baitfish ...

DDG, LHD, CVN? Decode key U.S. Navy ship abbreviations and learn what they mean and what vessels they designate.