Sheep, goats, octopuses, and toads have rectangular pupils.
7
Denmark has twice as many pigs as there are people.
66
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
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