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Roman glass retains turning into photonic crystals. Scientists lastly know why

Roman glass buried for two,000 years is slowly reworking into a wierd sort of crystal that refracts gentle in shocking methods, and scientists lastly know why.

One of these glass, utilized in jugs to hold water or wine, is usually discovered with a skinny patina of iridescent gold, blue, inexperienced and orange shimmering throughout its floor.

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