Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
There are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
22
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
The Titanic is about as long as the Empire State building is tall.
174
The Caspian Sea is also classed as the world's largest lake.
52
Water is actually naturally blue.
48
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