The Earth is about 4.5 billion years old.
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Fossilized bones reveal information about prehistoric diets.
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The human brain operates on about 20 watts of power.
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Water covers more than 70% of Earth's surface.
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Pandas have a specialized wrist bone that functions like a thumb.
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The Megalodon lived millions of years before humans appeared.
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The brain consumes a significant portion of the body's energy.
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The human skin is the body's largest organ.
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The human liver can regenerate lost tissue.
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