The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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There's a rare breed of pig that looks like a sheep.
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In the movie 'The Wizard Of Oz', Toto the dog's salary was $125 a week, while Judy Garland’s was $500 a week.
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It has been estimated that a bite from a grizzly bear can crush a bowling ball.
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Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
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Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
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