The “deep blue sea”—and our “blue planet” along with it!—owe their iconic color to the light of the sun. When the sun shines on the ocean, the water absorbs the longer red and orange wavelengths of ...

The ocean covers more than 70 percent of the Earth's surface. Considering how vast it is, scientists know relatively little about what's going on down there. On top of that, there are many popular ...

Compared to the actual deepest point of the ocean (the Mariana Trench stretches down nearly seven miles), 831 feet may not seem that deep. But when you consider that this intrepid diver was ...