Penn State University anthropologist Dr. Nina Jablonski explains how different shades of skin color arose as adaptations to the intensity of ultraviolet radiation in different parts of the world. This film is appropriate for science classes from middle school to college. The content connects to key concepts in biology, human biogeography, genetics, and anatomy and physiology. Chemistry and biochemistry classes will appreciate the focus on the effects of UV radiation on DNA, folate degradation, and vitamin D synthesis. To find classroom resources for this film and other materials, go to http://www.hhmi.org/biointeractive/biology-skin-color