Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
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The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
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In 1918, a homing pigeon saved over 190 American soldiers by delivering a message to nearby support despite having been shot through the breast, blinded in one eye, covered in blood, and with a leg hanging on by just a tendon.
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When cats are happy, they may squeeze their eyes shut.
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Early American humans hunted car-size armadillos and used their shells for houses.
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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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Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
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