Dogs have been man's pet for over 14,000 years.
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Early American humans hunted car-size armadillos and used their shells for houses.
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A 42-foot sperm whale has about 7 tons of oil in it.
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Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
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It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
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