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
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45
The full moon causes a tidal wave to roll up the Amazon river once in day and once in night for a period of only three weeks in a year. This results in continuous 4m high wave that can be surfed for up to 13km.
14
Elephants are among the most emotional creatures in the world - they have even been known to rescue other animals, such as trapped dogs.
25
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17