The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
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Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
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
Rattlesnake mating sessions have been known to last more than 22 hours.
232
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8
Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16