There was once an undersea post office in the Bahamas.
241
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
Sharks, like other fish, have their reproductive organs in their chests.
248
Two dogs were among the Titanic survivors.
262
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
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