Ok so this is only mildly related to photography but I think the science is pretty awesome. There is an article on a blog I don't know too well that talks about figuring out how statues were painted back in the Greek, Roman, and Egyptian times. They use techniques like rake lighting across the objects or ultraviolet light to find patterns on the surface. "Infrared and X-ray spectroscopy can help researchers understand what the paints are made of, and how they looked all that time ago." Its pretty amazing stuff.
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