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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There's a competition in Sweden called Kaninhoppning, or rabbit show jumping.
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Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
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When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
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