On October 4, 1957, the day Leave It to Beaver premiered on American television, the Soviet Union launched the space age. Sputnik, all of 184 pounds with only a radio transmitter inside its highly polished shell, became the first artificial satellite in space; while it immediately shocked the world, its long-term impact was even greater, for it profoundly changed the shape of the twentieth century. Paul Dickson chronicles the dramatic events and developments...