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
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45
Lobsters have blue blood.
476
Cows can sleep standing up, but they can only dream lying down.
745
Jumping fleas can accelerate 50 times faster than the space shuttle.
218