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科学为什么·英语30篇(1)

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Why Do Fireflies Glow Without Getting Hot?

Why Do Fireflies Glow Without Getting Hot?

为什么萤火虫发光却不发热?

  1. Fireflies produce light through bioluminescence—a cold chemical reaction inside living organisms, unlike burning or electric bulbs.
  2. Their light comes from luciferin reacting with oxygen, triggered by the enzyme luciferase and powered by ATP energy.
  3. Over 90% of the energy becomes visible light, with almost no infrared waste—so it’s called ‘cold light’.
  4. This efficiency far surpasses incandescent bulbs, which waste 90% of energy as heat rather than light.
  5. Each firefly species has unique flash patterns, helping mates recognize each other in crowded summer evenings.
  6. Some female fireflies mimic others’ signals to lure and eat males—a deadly case of deceptive communication.
  7. Scientists study luciferase to develop medical imaging tools, like tracking cancer cells using bioluminescent markers.
  8. Pollution, habitat loss, and artificial light now threaten many firefly populations worldwide—reducing both beauty and science.
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