Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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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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Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
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It has been scientifically proven that stroking a cat can lower one's blood pressure!
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