Did you know that life on planet Earth began in the oceans more than 3 billion years ago?

Over 70 percent of the earth's surface is covered by water. In fact, when seen from space, our earth looks blue, because of the large bodies of water which cover most of it. Although we speak of separate oceans, the world is really covered by one huge ocean in which the continents are islands!

There are four main oceans: the PACIFIC, ATLANTIC, INDIAN, and ARCTIC.

To learn some basic information on oceans, follow the links below.

• Climate
• Plants
• Animals
• Interesting Facts

To learn more about how people rely upon the oceans, CLICK HERE.

To learn more about oceans, visit these other web sites.

• Marine Ecosystems
• Neptune's Web: An Oceanographic Voyage in Learning
• Ocean Environment
• Ocean Planet
• Safari Touch Tank
• Sea and Sky: The Sea
• Secrets@Sea
• Secrets of the Ocean Realm
• Under the Sea
• Victor the Vector
• Wonders of the Seas

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