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
Squirrels forget where they hide about half of their nuts.
698
The male seahorse carries babies and 'gives birth' to them instead of the female.
7
Rattlesnake mating sessions have been known to last more than 22 hours.
232