A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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Cats recognise the voice of their owner, but never evolved to care.
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Allegedly, Chrysippus, the Greek philosopher, died of laughter after getting his donkey drunk and watching it try to eat figs.
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The Savannah is the largest domestic cat breed. It resembles a small leopard and behaves like a dog. They can grow up to 40 lbs, have an eight foot vertical jump, and can be trained to walk on a leash and play fetch.
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