Rattlesnake mating sessions have been known to last more than 22 hours.
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Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Jellyfish as a species are actually older than dinosaurs and sharks.
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Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
10
Domestic pigs average a top speed of about 11 miles per hour.
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