2 Marie Curie : Marie Curie is one of the most respected female scientists of all time. She was the first women to win a Nobel Prize, the first person to win a Nobel prize more than once, and the first women to become a professor at the University of Paris. She developed the theory of radioactivity, techniques for isolating radioactive isotopes, and the discovery of two elements. Curie invented the first mobile X-ray which aided in giving first aid to soldiers on the battlefield. She is known as “the mother of the atom bomb”. She unfortunately died of radiation poisoning. She was the discoverer of thorium, and invented radium.