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At the start of the twentieth century, Marie Curie, a Polish physicist and chemist, stunned the scientific world. Her research led to the discovery of two elements, polonium and radium. She also examined the most unusual property of these elements: radioactivity. This graphic... Read Full Overview

At the start of the twentieth century, Marie Curie, a Polish physicist and chemist, stunned the scientific world. Her research led to the discovery of two elements, polonium and radium. She also examined the most unusual property of these elements: radioactivity. This graphic... Read Full Overview