If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
Sharks, like other fish, have their reproductive organs in their chests.
248
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
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
Two dogs were among the Titanic survivors.
262
Jellyfish as a species are actually older than dinosaurs and sharks.
383
It's impossible to sink in the Dead Sea without equipment!
72