The Biology of Skin Color. Word Search Puzzle Solver. The Biology of Skin Color word Search Puzzle Game. Find words related to movie actors, actresses, and genres. Word Search Puzzle Solver. This film explores the hypothesis that different tones of skin color in humans arose as adaptations to the intensity of ultraviolet radiation in different parts of the world. This includes identifying and searching for words that are related to : Nina Jablonski, Documentary .