When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Female kangaroos have three vaginas.
2
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
Cats sleep for 70% of their lives.
8
Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16