Known as the Sargasso Sea, sailors have crossed it for centuries, but few notice the border when they slip into glassy indigo ...

In the Bering Strait, when the air temperature reaches a windchill of minus 65 degrees, the water freezes, but not all of it, so if you try to walk across, you won’t. On the Bering Sea ...

Today the Salton Sea covers some 350 square miles, but keeping it full has been a losing battle in recent decades, as Imperial Valley farmers undertook water conservation efforts after they agreed ...