I'm a metalsmith and my cat snuck into my studio and peed on some bronze sheet. Her urine reacted with the metal to create this interesting patina (any chemists in the house?). :
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:max_bytes(150000):strip_icc()/pee-color-collage-2000-dd554d62c7ed41c7b7e129f49cf3500b.jpg "What Urine Color Says About Your Health")
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