The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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Unsinkable Sam (nickname of a German ship's cat) who served on 3 warships, one German, two British, all sank in action. The cat survived each sinking, floating away on wooden planks to rescue.
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Dire wolves actually existed, living up to 10,000 years ago before going extinct.
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When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
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Ants have tiny magnetic compasses in their antennae which help them navigate.
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