The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
11
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10