Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
Sharks, like other fish, have their reproductive organs in their chests.
248
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
Female kangaroos have three vaginas.
2
Early American humans hunted car-size armadillos and used their shells for houses.
12