Credit: In this April 18, 2007 file photo, a fold-out from a book published in 1524 shows a map of the Aztec Empire's capital of Tenochtitlan, right, now Mexico City, and an interpretation of the Gulf of Mexico, left, based on the eyewitness account of Spanish conquistador Hernan Cortes, at the Newberry Library in Chicago. (AP Photo/Charles Rex Arbogast, File)
