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
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
Water is actually naturally blue.
48
There was once an undersea post office in the Bahamas.
241
It's impossible to sink in the Dead Sea without equipment!
72