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Leningrad
Dicyanin Used in Covert Operations
Soviet Union, 1960—behind locked doors and flickering lab lights, scientists toyed with something they barely understood. Dicyanin dye, rumored to shift human sight beyond the visible spectrum, was said to reveal more than just darkness—it exposed what was hiding in it. Some who gazed through treated lenses spoke of strange flickers, shadows moving where none should be. Others refused to say what they saw at all.