The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
There was once an undersea post office in the Bahamas.
241
The Titanic is about as long as the Empire State building is tall.
174
Water is actually naturally blue.
48
The time interval from first sighting of the iceberg that sank the Titanic to impact was a little over 30 seconds.
105
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
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