Cows can sleep standing up, but they can only dream lying down.
745
Ants have tiny magnetic compasses in their antennae which help them navigate.
9
The reindeer is the only mammal that can see UV light.
17
Cats recognise the voice of their owner, but never evolved to care.
22
The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
10
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