Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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There's a phone app called RoboRoach that allows you to remotely control a cockroach through a chip that you to manually implant into the unwitting critter.
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Australian Graham Barker has been collecting his own belly button fluff every day since 1984 - keeping it in storage jars.
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