You might be hearing about the gulf off the coast of the U.S. and Mexico. Here's what to know about the body of water the size of Alaska.

With war raging in the Middle East, efforts to tackle this ever-worsening ecological disaster appear to have dissolved too.

Once the world's fourth-largest lake, the Aral Sea has shrunk due to Soviet-era irrigation, sparking crises as Uzbekistan fights desertification ...

As two of Earth's great tectonic plates slowly crash together, the Mediterranean Sea is likely to be wiped off the face of ...