Book excerpt: Marie Curie discovered radium and went on to lead the scientific community in studying the theory behind and the uses of radioactivity. She left a vast legacy to future scientists through her research, her teaching, and her contributions to the welfare of humankind. She was the first person to win two Nobel Prizes, yet upon her death in 1934, Albert Einstein was moved to say, "Marie Curie is, of all celebrated beings, the only one whom fame has not corrupted." She was a physicist, a wife and mother, and a groundbreaking professional woman. This biography is an inspirational and exciting story of scientific discovery and personal commitment. Oxford Portraits in Science is an on-going series of scientific biographies for young adults. Written by top scholars and writers, each biography examines the personality of its subject as well as the thought process leading to his or her discoveries. These illustrated biographies combine accessible technical information with compelling personal stories to portray the scientists whose work has shaped our understanding of the natural world.