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The characteristic green yellow glow produced by a firefly is the result of a chemical reaction that takes place in the insect's abdomen. This chemical reaction involves three ingredients luciferin (a heat resistant substrate and serves as the source of the light) luciferase (an enzyme that triggers the light producing chemical reaction) and oxygen (provides the fuel for the reaction to proceed).

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10y ago
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15y ago

Fireflies are out all day, you just get to see them better at night because of the light they emit.

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Q: Why do fireflies come out at dusk?
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