Ocean - Economy

Ocean (from Okeanos, Greek for river, the ancient Greeks noticed that a strong current flowed off Gibraltar, and assumed it was a great river); covers almost three quarters (71%) of the surface of the Earth, and nearly half of the world's marine waters are over 3000 m deep. This global, interconnected body of salt water, called the World Ocean, is divided by the continents and archipelagos into the following four bodies, from the largest to the smallest: the Pacific Ocean, the Atlantic Ocean, the Indian Ocean, and the Arctic Ocean, and, according to some authorities such as International Hydrographic Organizati ...

Including:

• Ocean - Origins
• Ocean - Exploration
• Ocean - Climate
• Ocean - Ecology
• Ocean - Economy
• Ocean - Ancient oceans
• Ocean - Ocean rowing
• Ocean - Extraterrestrial oceans

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Travel on the surface of the ocean through the use of boats dates back to prehistoric times, but only in modern times has extensive underwater travel become possible. The deepest point in the ocean is the Mariana Trench located in the Pacific Ocean near the Northern Mariana Islands. It has a maximum depth of 10,923 m (35,838 ft) [1]. It was fully surveyed in 1951 by the British naval vesse ...

See also:

Ocean, Ocean - Origins, Ocean - Exploration, Ocean - Climate, Ocean - Ecology, Ocean - Economy, Ocean - Ancient oceans, Ocean - Ocean rowing, Ocean - Extraterrestrial oceans

Read more here: » Ocean: Encyclopedia II - Ocean - Exploration

Earth is the only known planet with liquid water on its surface, and is certainly the only such in our own solar system. However, liquid water is thought to be present under the surface of several natural satellites, particularly the Galilean moons of Europa, and, with less certainty, its fellows Callisto and Ganymede. Other icy moons may have once had internal oceans that have now frozen, such as Triton. The planets Uranus and Neptune may also possess large oceans of liquid water under their thick atmospheres, though their intern ...

See also:

Ocean, Ocean - Origins, Ocean - Exploration, Ocean - Climate, Ocean - Ecology, Ocean - Economy, Ocean - Ancient oceans, Ocean - Ocean rowing, Ocean - Extraterrestrial oceans

Read more here: » Ocean: Encyclopedia II - Ocean - Extraterrestrial oceans