Why exactly does Kryptonite hurt Superman?
“Superman’s cells absorb electromagnetic radiation from stars (like Earth’s sun). Kryptonite’s radioactivity interferes with this semi-photosynthetic process, driving the energy out of his cells in a painful fashion. Some versions of the adverse effects of kryptonite describe the radiation as affecting the blood chemistry of the victim, causing accelerated effects similar to sickle cell anemia in terrestrial humans, and also causing the skin of the victim to turn green as exposure time increases.” http://en.wikipedia.org/wiki/Kry…
