In 1992, 29,000 rubber ducks washed off a ship. They were found thousands of miles away 8 years later.
707
The Caspian Sea is also classed as the world's largest lake.
52
There was once an undersea post office in the Bahamas.
241
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
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
Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6
Water is actually naturally blue.
48
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119