Sea otters hold hands while sleeping so they don’t drift away from each other.
104
Water is actually naturally blue.
48
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
The Caspian Sea is also classed as the world's largest lake.
52
There are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
22
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46