When dragonflies mate, their tails form a love heart.
22
Rattlesnake mating sessions have been known to last more than 22 hours.
232
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Penguins have a gland above their eye that turns saltwater into freshwater.
12
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
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