The total surface area of human lungs is roughly the same size as a tennis court.
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In 1953, Watson and Crick described the double-helix structure of DNA.
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Some animals can regenerate entire body parts.
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The Sumerians developed one of the earliest writing systems.
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The barreleye fish has a transparent head and upward-facing eyes.
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Insulin was first used to treat diabetes in the early 1920s.
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Your brain uses 20% of your energy.
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Certain fish can inflate their bodies to appear larger.
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The Earth's axis is tilted about 23.5 degrees.
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