Early American humans hunted car-size armadillos and used their shells for houses.
12
The cat brain weighs about 30g.
167
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
There's a rare breed of pig that looks like a sheep.
14
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
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
The CIA once spent $20 million on a cat equipped with gear to spy on the Soviets, but it was hit by a taxi.
328