Oceans
Water World
More than 70% of the Earths surface is covered in Ocean, with the deepest point measuring 36,000 feet. Travel across its surface dates back to prehistoric times, but only in modern times has extensive underwater exploration become possible.
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Quiz: Shallow Seas
The shallow seas are the richest parts of the ocean, alive with coral reefs and 90% of the world's commerical fisheries.
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Deep Blue Gallery
See stingrays, killer whales and fluorescent fish in our amazing underwater picture gallery...
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Quiz: Fresh water
Fresh water is incredibly rare. Just 3% of Earth's water is fresh and the rest is seawater. Nevertheless, life on land is dependent on fresh water.
