Dogs have been man's pet for over 14,000 years.
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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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An alligator can go through 2,000 to 3,000 teeth in a lifetime.
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The two oldest cats on record lived to 38 and 34 years old, both were owned by the same owner and lived off a diet of bacon, eggs, broccoli and coffee.
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Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
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A zoo in China gave a gay penguin couple the opportunity to raise a chick.
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A cow produces around 200,000 glasses of milk in her lifetime.
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