The Caspian Sea is also classed as the world's largest lake.
52
More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
17
There was once an undersea post office in the Bahamas.
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Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6
NYC's Metropolitan Transit Authority (MTA) dumps old subway cars into the ocean to serve as artificial reef.
8
The roar that we hear when we place a seashell next to our ear is not the ocean, but rather the sound of blood surging through the veins in the ear.
476
In 1992, 29,000 rubber ducks washed off a ship. They were found thousands of miles away 8 years later.
707