The Stuff That Is Made Of Los Alamos physicist Geoffrey Reeves knows that the space just outside of Earth’s protective atmosphere is a tempestuous, radiation-filled environment that can knock an orbiting satel- lite dead. So Reeves and a small team developed DREAM: software that gives satellite operators a heads up about the conditions surrounding their spacecraft and, thus, a chance to prepare for the worst of space-stormy weather. 1663 los alamos science and technology magazine june 2012 15 15