Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
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Parrot parents "name" their children with a signature call.
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An Indian man known as "Snake Manu" can put small snakes, including deadly cobras, into his mouth and pass them out through his nose.
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A group of kittens is called a "kindle".
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The ancestor of all domestic cats is the African Wild Cat which still exists today.
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