There are approximately three chickens for every human on Earth.
13
The Basenji dog is the only dog that is not able to bark.
4
There's a rare breed of pig that looks like a sheep.
14
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Cats recognise the voice of their owner, but never evolved to care.
22
The Platypus used to be considered a myth like Bigfoot and the Yeti.
18