NYC's Metropolitan Transit Authority (MTA) dumps old subway cars into the ocean to serve as artificial reef.
8
There was once an undersea post office in the Bahamas.
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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 are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
22
In 1992, 29,000 rubber ducks washed off a ship. They were found thousands of miles away 8 years later.
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Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6
There are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
22