The Caspian Sea is also classed as the world's largest lake.
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NYC's Metropolitan Transit Authority (MTA) dumps old subway cars into the ocean to serve as artificial reef.
8
There are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
22
There are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
22
Water is actually naturally blue.
48
In 1992, 29,000 rubber ducks washed off a ship. They were found thousands of miles away 8 years later.
707
Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6
The North Atlantic gets 2.5 centimetres (1in) wider every year.
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