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In the new method, researchers from the University of Texas at Austin fired infrared light, a type of light invisible to the eye, from LED bulbs at test tubes that contained human skin cancer or colon cancer cells and healthy human skin cells. The tubes also contained nanoscopic flakes of tin oxide, or SnOx nanoflakes, which were absorbed by the cancer cells. The scientists found that when the light was fired at the cells, the nanoscopic flakes absorbed it and heated up, turning into 'microscopic heaters' that damaged cancer cells and caused them to die, while leaving the healthy cells...