The most expensive cow in the world was sold in 2009 for $1.2 million.
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The ancestor of all domestic cats is the African Wild Cat which still exists today.
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Lurch, a Watusi bull, had the largest horns in the world.
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Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
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Dogs sometimes fake being sick to get attention.
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