The reindeer is the only mammal that can see UV light.
17
Early American humans hunted car-size armadillos and used their shells for houses.
12
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
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