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
Lobsters have blue blood.
476
Lurch, a Watusi bull, had the largest horns in the world.
32
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402
Sharks have been on the planet longer than trees.
14
Dolphins have names for one another.
18