Female kangaroos have three vaginas.
2
Baks the blind boxer has a seeing eye goose named Buttons; a four-year-old goose who leads the pup around everywhere either by hanging onto him with her neck, or by honking to tell him which way to go.
16
The colossal squid has the largest eyes in the world.
4
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6