In terms of sheer area, oceans are top of the list of the most common landforms. Yes, even oceans are landforms, given that they are composed of vast basins riddled with trenches and mountains.

more than 96% of it is contained in one of earth's five oceans. From the Arctic to the Southern, the five ocean basins are home to thousands of marine life and millions of square miles of water.

A team of astrophysicists, geoscientists, chemists and life scientists affiliated with a host of institutions in Japan has found evidence that billions of years ago, the Earth's oceans were green.

It's five times stronger than the Gulf Stream ... Atlantic and Indian oceans. The system regulates Earth's climate and pumps water, heat and nutrients around the globe. But fresh, cool water ...