This classic Big Bang text neatly describes what happened after the bang. Yet until recently particle physicists & cosmologists were stuck on many questions that the Big Bang Theory still couldnt answer primarily: If matter can neither be created nor destroyed how could so much matter arise from nothing at all? Alan Guths Inflationary Universe Theory answers these vexing questions. When NASAs Cosmic Background Explorer satellite measured the non-uniformities of the cosmic background radiation for the first time in 1992 the patterns agreed exquisitely with the theorys predictions.