One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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Honeypot ants are a unique insect that use their own bodies as living storage pots of honey.
4
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
Early American humans hunted car-size armadillos and used their shells for houses.
12
The Platypus used to be considered a myth like Bigfoot and the Yeti.
18
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
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