Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
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Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
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A giraffe's kick is so powerful that it can decapitate a lion.
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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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Dogs sometimes fake being sick to get attention.
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Whales and dolphins can't taste anything other than salt.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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