There was once an undersea post office in the Bahamas.
241
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
In 1992, 29,000 rubber ducks washed off a ship. They were found thousands of miles away 8 years later.
707
There are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
22
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
Water is actually naturally blue.
48
Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6