The ancestor of all domestic cats is the African Wild Cat which still exists today.
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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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Dire wolves actually existed, living up to 10,000 years ago before going extinct.
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The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
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Some older/less efficient worker termites will develop 'backpacks' of toxic chemicals that explode when the termite is threatened. They are essentially used as suicide bombers when the colony is being attacked.
8
When a male honey bee climaxes during sex, his testicles explode and then he dies.
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