Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Cattle are the only mammals that pee backwards.
33
Woodpecker scalps, porpoise teeth and giraffe tails have all been used as money.
46
Beavers have orange teeth!
23
Frogs cannot swallow without blinking.
41
There's a young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
40
Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
10
