Dogs have been man's pet for over 14,000 years.
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It has been estimated that a bite from a grizzly bear can crush a bowling ball.
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When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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Sloths take two weeks to digest their food.
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A group of kittens is called a "kindle".
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