<prompt> Answer this question truthfullyWhat is the explanation for Ultraviolet? Could you recommend some additional reading materials about the subject?  <response>: <reason> Hu, S; Ma, F; Collado-Mesa, F; Kirsner, R. S. 2004, UV radiation, latitude, and melanoma in US Hispanics and blacks, Arch. Dermatol., 140 7: 819824, doi: 10.1001archderm.140.7.819 Unknown parameter month ignored help Hockberger, Philip E. 2002, A History of Ultraviolet Photobiology for Humans, Animals and Microorganisms PDF, Photochemisty and Photobiology, 76 6: 561569, Error: Bad DOI specified! Allen, Jeannie 2001-09-06, Ultraviolet Radiation: How it Affects Life on Earth, Earth Observatory, NASA, USA 