Twenty women who made a difference in science are presented here. From Ada Lovelace (computing) to Marie Curie (Physics and Chemistry) these exceptional women enabled the world to advance in all fields of science including space exploration (Mae Jamison), telecommunications (the actress also genius dis-coverer Hedy Lamarr) and Biology (Rosalind Franklin). An inspiration going counter to preconceived notions about women and science, presenting a diverse group from around the world.