Cows can sleep standing up, but they can only dream lying down.
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The elephant brain weighs about 6,000g.
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The reindeer is the only mammal that can see UV light.
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A cow produces around 200,000 glasses of milk in her lifetime.
373
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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