While this set brings together an array of well-known and lesser known scientists, the focus is on their work, with their scientific achievements presented in everyday language that makes even the most complex concepts accessible. The well-known scientific "greats" of history are featured, along with contemporary scientists whose work is just verging on greatness. Among these are many minority scientists who have often been excluded from similar books. Entries are organized by field, by country of birth, by country of major scientific activity, and by year of birth.