In this series, readers will travel back in time, experiencing the lives and cultures of some of the world's greatest scientists. Engrossing text and primary source images help students gain perspective on the scientific climate surrounding history's greatest scientific discoveries and theories. The text is accompanied by primary source images of the tools, manuscripts, illustrations, and artifacts of these scientists, who changed the way we see the world, both politically and religiously. This series is an eye-opening addition to any library. Hubble's discovery of the Big Bang is one of the most important in astronomy and physics. It taught us where the universe came from and how it might end. Students will learn how Hubble's early, unprecedented photographs of pulsars served as one of the first clues along the path that led him to the discovery of the Big Bang. Readers will also see how Hubble's discovery opened up new doors to information about the universe.