If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
The Titanic is about as long as the Empire State building is tall.
174
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
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
Jellyfish as a species are actually older than dinosaurs and sharks.
383
There was once an undersea post office in the Bahamas.
241