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 colossal squid has the largest eyes in the world.
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Tigers can see 6 times better at night than humans.
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Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
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When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
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During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
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