The Basenji dog is the only dog that is not able to bark.
4
Some older/less efficient worker termites will develop 'backpacks' of toxic chemicals that explode when the termite is threatened. They are essentially used as suicide bombers when the colony is being attacked.
8
In 1949, an official boxing match between a bear and a man was held. The bear won.
41
A scorpion can hold its breath for up to 6 days.
19
When the "Elephant Whisperer" Lawrence Anthony died, a whole herd of elephants arrived at his house to mourn him.
25
The ancestor of all domestic cats is the African Wild Cat which still exists today.
12