The Caspian Sea is also classed as the world's largest lake.
52
Sharks, like other fish, have their reproductive organs in their chests.
248
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
Jellyfish as a species are actually older than dinosaurs and sharks.
383
The time interval from first sighting of the iceberg that sank the Titanic to impact was a little over 30 seconds.
105
The Titanic is about as long as the Empire State building is tall.
174
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181