Forget Angel Falls; the world's largest waterfall is an invisible underwater giant. The Denmark Strait cataract, between Greenland and Iceland, plunges 3,500 meters, dwarfing land-based falls. This ...

The oceans are mostly composed of warm salty water near the surface over cold, less salty water in the ocean depths. These ...

The southern Indian Ocean off the west coast of Australia is becoming less salty at an astonishing rate, largely due to ...

The Pacific Ocean is warming so quickly that scientists had to find a new method for detecting and predicting El Niño and La Niña events.