NYC's Metropolitan Transit Authority (MTA) dumps old subway cars into the ocean to serve as artificial reef.
8
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 Titanic is about as long as the Empire State building is tall.
174
In 1992, 29,000 rubber ducks washed off a ship. They were found thousands of miles away 8 years later.
707
The Caspian Sea is also classed as the world's largest lake.
52
Two dogs were among the Titanic survivors.
262