A newly discovered neural circuit in the brain of the common fruit fly seems to serve as a sort of "volume control," turning up and down the perception of sound and light. Nicholas Monu/iStockphoto hide caption

itoggle caption Nicholas Monu/iStockphoto

Would time spent with Anton Chekov, famed for his subtle, flawed characters, make you a better judge of human nature? Hulton Archive/Getty Images hide caption

itoggle caption Hulton Archive/Getty Images