A counter-demonstrator squares off with immigrant rights supporters during a protest outside Wrigley Field before the start of the Cubs game against the Arizona Diamondbacks Thursday in Chicago. Dozens of people demonstrated outside the park calling for a boycott of the series to protest the passage of Arizona's controversial immigration law. Scott Olson/Getty Images hide caption

Red and green aphids get their different colors by producing carotenoids, or color compounds. Courtesy of Charles Hedgcock, R.B.P. hide caption

Stephen Quake (left) and Euan Ashley review genetic risk factors that Ashley and colleagues found in Quake's genome. Norbert von der Groeben/Stanford School of Medicine hide caption

Running For Profit: Enron tells the story of how the company's chief executive officer, Jeffrey Skilling (Norbert Leo Butz, left), and chief financial officer, Andrew Fastow (Stephen Kunken, right), brought about the corporation's downfall. Joan Marcus hide caption