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Optical Device Uses Humidity to Unlock Hidden Information, Offers New Option for Data Storage
May 27, 2026
LA JOLLA, California, May 27 -- The University of California San Diego campus posted the following news:

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Optical Device Uses Humidity to Unlock Hidden Information, Offers New Option for Data Storage

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Engineers at the University of California San Diego have developed an optical device that reveals hidden images and changes colors in response to different levels of humidity. The technology, published in Light: Science & Applications, c . . .

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