Cows can sleep standing up, but they can only dream lying down.
745
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2
Dogs sometimes fake being sick to get attention.
26
When dragonflies mate, their tails form a love heart.
22
Rattlesnake mating sessions have been known to last more than 22 hours.
232