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VBAK0 TIL: The trousers of the British Royal Air Force WWIl uniforms had two buttons that served as a compass when put together.
69eWJ TIL porcelain dentures included traces of uranium up until the mid-1980s, the idea was the fluorescence provided by uranium would better mimic the colour of natural teeth
M7xNW TIL factory workers were told to clean the paintbrushes on their lips while painting the self-luminating radioactive radium dials on watches in the 1920s.