In 2011, a male tiger in India adopted a litter of orphaned cubs, taking on the role of ‘mother’. Wildlife officials say such behavior had never been observed before.
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Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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Alligators can live up to 100 years.
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Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
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Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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