The biggest iceberg in the world, known as A23A, is on the move for the first time in 40 years. After being grounded on a shoal for decades, the massive berg broke free last week.

The iceberg has been closely monitored due to concerns that it may collide with South Georgia, "potentially threatening a delicate ecosystem," the NOAA warned.

How a professional ship-sinker is about to turn a famous ocean liner into the world’s largest artificial reef The SS United States is towed at sunset past Key West, Fla., headed to Mobile, Ala., ...

As the historic SS United States gets ready to be converted into the world’s largest artificial reef off the coast of Florida ...

The twilight zone of the ocean is a mysterious place. At 200-1000 meters below the surface, it's a tough place to study. That ...