Engineering

Bionic jellyfish swim faster and more efficiently

Engineers at Caltech and Stanford University have developed a tiny prosthetic that enables jellyfish to swim faster and more efficiently than they normally do, without stressing the animals. The researchers behind the project ...

Energy & Green Tech

Marine bioplastic made with fish waste, red algae wins prize

Laura Parker in National Geographic last year: Scientists have tried to get a handle on the amount of plastic that ends up in the seas and harm to birds, marine animals, and fish. .Billions of tons of plastic have been made ...

Energy & Green Tech

Ocean power: A green option failing to make waves

The tidal power plant on the Rance river in Brittany, France, stands as a reminder of the underexploited potential of energy generation from ocean tides, waves and warmth.

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Ocean

An ocean (from Greek Ωκεανός, Okeanos (Oceanus)) is a major body of saline water, and a principal component of the hydrosphere. Approximately 71% of the Earth's surface (an area of some 361 million square kilometers) is covered by ocean, a continuous body of water that is customarily divided into several principal oceans and smaller seas. More than half of this area is over 3,000 meters (9,800 ft) deep. Average oceanic salinity is around 35 parts per thousand (ppt) (3.5%), and nearly all seawater has a salinity in the range of 30 to 38 ppt.

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