The human eye can detect a single photon under perfect conditions.
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In 1996, Dolly the sheep became the first cloned mammal from an adult cell.
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The discovery of DNA’s structure occurred in 1953.
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The human brain operates on about 20 watts of power.
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The barometer measures atmospheric pressure.
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Some prehistoric creatures were larger than modern equivalents.
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The earliest dinosaurs were relatively small.
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