Water is actually naturally blue.
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In 1992, 29,000 rubber ducks washed off a ship. They were found thousands of miles away 8 years later.
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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.
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If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
The Caspian Sea is also classed as the world's largest lake.
52
There was once an undersea post office in the Bahamas.
241
There are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
22