Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
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
Early American humans hunted car-size armadillos and used their shells for houses.
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The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
The Platypus used to be considered a myth like Bigfoot and the Yeti.
18
The CIA once spent $20 million on a cat equipped with gear to spy on the Soviets, but it was hit by a taxi.
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