Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Gorillas can catch human colds and other illnesses.
205
Elephants are among the most emotional creatures in the world - they have even been known to rescue other animals, such as trapped dogs.
25
In Monopoly, the character locked behind the bars is called Jake the Jailbird. Officer Edgar Mallory sent him to jail.
65
In Brazil, prison inmates can reduce their sentence by 4 days (up to 48 days a year) for every book they read and write a report on.
32
When the 2013 government shutdown threatened the closing down of a national program giving medical attention and meals to children, John D. Arnold donated $10 million of his own money to keep it afloat.
21
In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13