Cats recognise the voice of their owner, but never evolved to care.
22
Mosquitoes don't just bite you, they also pee on you.
11
Penguins have a gland above their eye that turns saltwater into freshwater.
12
The reindeer is the only mammal that can see UV light.
17
Ants have tiny magnetic compasses in their antennae which help them navigate.
9
Sheep, goats, octopuses, and toads have rectangular pupils.
7
When you shave a guinea pig it looks like a little hippo.
19