One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
The reindeer is the only mammal that can see UV light.
17
Penguins have a gland above their eye that turns saltwater into freshwater.
12
There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
40
Ants have tiny magnetic compasses in their antennae which help them navigate.
9