WebJan 2, 2024 · Green fluorescent protein (GFP) is a protein that occurs naturally in the jellyfish Aequorea victoria. The purified protein appears yellow under ordinary lighting but glows bright green under sunlight or ultraviolet light. The protein absorbs energetic blue and ultraviolet light and emits it as a lower energy green light via fluorescence. WebDec 21, 2024 · Stone Bridge glows with green light. How do you refresh a 130-year-old stone bridge? Light it up, of course! That’s what the city of Johnstown did with its Stone Bridge over the Conemaugh River, which was built in 1887 by the Pennsylvania Railroad.
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