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