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 young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
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There's a phone app called RoboRoach that allows you to remotely control a cockroach through a chip that you to manually implant into the unwitting critter.
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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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It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
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