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
Parrot parents "name" their children with a signature call.
112
Rattlesnake mating sessions have been known to last more than 22 hours.
232
Condoms were originally made of animal intestines or linen.
347
A dog's naked behind leaves absolutely no bacteria when pressed against carpet.
250
