The Earth's rotation causes day and night cycles.
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The pacemaker regulates irregular heartbeats.
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A grizzly bear can run surprisingly fast over short distances.
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The human brain weighs about three pounds on average.
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Bees have five eyes.
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Cats have a reflective layer in their eyes that improves night vision.
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A dog’s nose print is unique, similar to a human fingerprint.
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An African elephant's ears help regulate its body temperature.
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The saber-toothed cat went extinct around 10,000 years ago.
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