Rattlesnake mating sessions have been known to last more than 22 hours.
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If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
13
When cats are happy, they may squeeze their eyes shut.
10
A group of unicorns is called a blessing.
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Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
The Savannah is the largest domestic cat breed. It resembles a small leopard and behaves like a dog. They can grow up to 40 lbs, have an eight foot vertical jump, and can be trained to walk on a leash and play fetch.
17
It has been scientifically proven that stroking a cat can lower one's blood pressure!
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