NYC's Metropolitan Transit Authority (MTA) dumps old subway cars into the ocean to serve as artificial reef.
8
Sharks, like other fish, have their reproductive organs in their chests.
248
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
Two dogs were among the Titanic survivors.
262
Water is actually naturally blue.
48
The Caspian Sea is also classed as the world's largest lake.
52
It's impossible to sink in the Dead Sea without equipment!
72
The Titanic is about as long as the Empire State building is tall.
174