Rattlesnake mating sessions have been known to last more than 22 hours.
232
Condoms were originally made of animal intestines or linen.
347
An average cat has 1-8 kittens per litter and can have 2-3 litters per year. During her productive life, one female cat could have more than 100 kittens. A single pair of cats and their kittens can produce as many as 420,000 kittens in just 7 years.
10
Cows can sleep standing up, but they can only dream lying down.
745
Dolphins have names for one another.
18
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79