Fortunately, UV light is a weak form of radiation and it does not penetrate past the surface cells of your skin. (joannenova.com.au)
Stubenhaus et al. found that S. mediterranea makes porphyrins in the pigment cells of its skin using the same genes that make porphyrins in humans. (elifesciences.org)
Melanoma is a form of cancer that develops from the pigment producing cells of the skin. (genomel.org)