Greyhounds have the best eyesight of any breed of dog.
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The heart of a mouse beats 650 times per minute!
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When dragonflies mate, their tails form a love heart.
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An alligator can go through 2,000 to 3,000 teeth in a lifetime.
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Cats and dogs can hear ultrasound.
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Owls are one of the only birds who can see the color blue!
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The Giant South African Earthworm can grow up to 22 feet long and 1 inch in thick.
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The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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