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
In 1992, 29,000 rubber ducks washed off a ship. They were found thousands of miles away 8 years later.
707
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
The roar that we hear when we place a seashell next to our ear is not the ocean, but rather the sound of blood surging through the veins in the ear.
476
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46