• Will glow-in-the-dark materials someday light our cities?

    12 days ago - By Ars Technica

    Enlarge / Daan Roosegaarde is the artist behind the glow-in-the-dark Van Gogh fietspad.
    Around the year 1603, Italian shoemaker and amateur alchemist Vincenzo Casciarolo tried smelting some especially dense stone he had found on the slopes of Mount Paderno, near Bologna. No gold, silver, or other precious metals resulted as he had hoped. But after the stone had cooled, Casciarolo discovered something interesting: if he exposed the material to sunlight and then took it into a dark room, the stone would glow.
    That "Bologna Stone" was the first artificially prepared, persistently luminescent...
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