Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Cats recognise the voice of their owner, but never evolved to care.
22
The largest earthworm on record was found in South Africa and measured 22 feet.
151
The colossal squid has the largest eyes in the world.
4
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
34
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20