Jellyfish as a species are actually older than dinosaurs and sharks.
383
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
The Caspian Sea is also classed as the world's largest lake.
52
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
It's impossible to sink in the Dead Sea without equipment!
72
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