Home Science Health and Medicine Sunlight continues to damage skin in the dark

Much of the damage that ultraviolet radiation does to skin occurs hours after sun exposure, a team of researchers has concluded. While noting that news of the carcinogenic effect of melanin is disconcerting, the researchers also pointed to a ray of hope: The slowness of chemiexcitation may allow time for new preventive tools, such as an "evening-after" sunscreen designed to block the energy transfer.

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