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The oceans hold approximately 97 percent of the water on Earth and cover more than two-thirds of its surface. Oceans hold food, chemicals, and minerals, yet oceanography is a fairly new science. In fact, according to the Oceanography Society, it was only during the 20th century that we got the first global glimpse of how the oceans work. With such inventions as deep-sea diving gear, scuba, the bathysphere (a steel diving sphere for deep-sea observation), and underwater robotic equipment, scientists are undertaking more detailed studies of underwater life. Oceanography includes studying air and sea interaction in weather forecasting, solving sea mining problems, predicting and preventing pollution, studying sea life, and improving methods of deriving foods from the ocean. It is difficult to project what oceanographers of the future may be doing. They may be living and working on the ocean floor. The U.S. Navy Medical Research Laboratory has conducted experiments with people living under 200 feet of water.

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