Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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The reindeer is the only mammal that can see UV light.
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Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
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Only 3% of bird species have penises.
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A zoo in China gave a gay penguin couple the opportunity to raise a chick.
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