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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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The cat brain weighs about 30g.
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A group of pugs is called a grumble.
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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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A zoo in China gave a gay penguin couple the opportunity to raise a chick.
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Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9