00:00Ever seen a firefly? Then you know it's unforgettable. This tiny beetle doesn't just
00:05fly, it glows, lighting up warm July nights like floating stars. Its glow isn't magic,
00:11it's bioluminescence, powered by a chemical reaction between luciferin and luciferase,
00:16discovered by French scientist Raphael Dubois. Even cooler. Fireflies can blink on and off at
00:22will, and their light gives off zero heat. No batteries. No fire. Just pure biological
00:29brilliance. A natural wonder you'll never forget.
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