Last Updated: Jul 18, 2016
An ocean of teacher-approved marine education resources
- NASA Oceanography
Looking at our Earth from space, it is obvious that we live on a water planet. Ocean covers over 70% of the Earth's surface and contains about 97% of the Earth's surface water. Life in the oceans can be found from the surface to the extreme environments at the bottom of the deepest submarine trench. It is not surprising that the oceans represent over 99% of the living space on Earth...we are indeed living on what is truly an ocean planet.
- The Water Page
For many years sailors and other people who are interested in water have talked about sailing the seven seas. The thought of sailors who sailed the seven seas meant that they were experienced sailors who have traversed all of the different bodies of water throughout the world. The origins of the seven seas have been dated back to around 2300 BC in Mesopotamia. Over the course of time the definition of which bodies of water that constitutes the seven seas have changed.