Sea otters hold hands while sleeping so they don’t drift away from each other.
104
There was once an undersea post office in the Bahamas.
241
It's impossible to sink in the Dead Sea without equipment!
72
Two dogs were among the Titanic survivors.
262
In 1992, 29,000 rubber ducks washed off a ship. They were found thousands of miles away 8 years later.
707
Sharks, like other fish, have their reproductive organs in their chests.
248
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119