Some coral reefs are visible from space.
Fact #197
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The Dead Sea is so salty that you can float on its surface without swimming — it's almost impossible to sink.
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The ocean contains structures larger than mountain ranges.
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The ocean contains structures larger than mountain ranges.
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Water covers more than 70% of Earth's surface.
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The world's longest coral reef system, the Great Barrier Reef, is visible from space.
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