The seahorse is the only fish to have a neck.
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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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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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Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
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Female kangaroos have three vaginas.
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