There are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
22
Water is actually naturally blue.
48
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
NYC's Metropolitan Transit Authority (MTA) dumps old subway cars into the ocean to serve as artificial reef.
8
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
The Caspian Sea is also classed as the world's largest lake.
52