Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
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Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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Tigers can see 6 times better at night than humans.
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Cats lose almost as much fluid in the saliva while grooming themselves as they do through urination!
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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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It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
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