By putting a frog in a bucket of milk, scientists following up on an ancient Russian way of keeping milk from going sour have identified a wealth of new antibiotic substances.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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Two dogs were among the Titanic survivors.
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Cats sleep for 70% of their lives.
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Cats and dogs can hear ultrasound.
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