The human eye adapts to darkness by increasing light sensitivity.
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A sea anemone uses stinging cells to capture prey.
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The first artificial heart was implanted in the 1980s.
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The human body produces red blood cells in bone marrow.
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Certain fish can inflate their bodies to appear larger.
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The invention of dialysis allows patients with kidney failure to survive.
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Ants do not have lungs and breathe through small openings in their bodies.
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Your bones are stronger than steel.
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The wheel is one of the earliest human inventions.
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