Sharks, like other fish, have their reproductive organs in their chests.
248
There was once an undersea post office in the Bahamas.
241
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
NYC's Metropolitan Transit Authority (MTA) dumps old subway cars into the ocean to serve as artificial reef.
8
The Caspian Sea is also classed as the world's largest lake.
52
Jellyfish as a species are actually older than dinosaurs and sharks.
383