Read. Then answer the questions:
Most of the world's surface is water. We may know the land very well, but we know very little about the oceans.
Until recently, man could not stay underwater for long. A pearl diver, for example, couldn't stay underwater for longer than two minutes. But now, with special breathing equipment, a diver can stay underwater for a long time. After the invention of this equipment, an could swim freely underwater and scuba-diving became a popular sport.
A Frenchman Jacques Coustean (1910 - 1997), invented a deep-sea diving vessel, he could explore the oceans of the world and study underwater life.
Now. we can explore the oceans, using special TV cameras as well. We can learn more about the undersea world thanks to this invention.
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