Cows can sleep standing up, but they can only dream lying down.
745
Early American humans hunted car-size armadillos and used their shells for houses.
12
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Macaques monkeys in Japan learned to steal purses and wallets, take out the coins, and use them to buy drinks and snacks from vending machines.
26
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10