Condoms were originally made of animal intestines or linen.
347
Vanilla flavoring is sometimes made with an ingredient from beaver pee.
82
The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
10
The ancestor of all domestic cats is the African Wild Cat which still exists today.
12
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132