Pierre Curie was a chemist who studied crystallography, magnetism, piezoelectricity, and the emerging field of radioactivity, first observed by A. H. Becquerel in 1896. Pierre and his wife Marie worked to isolate polonium and radium. Working with a student, Pierre also discovered nuclear energy by identifying the continuous emission of heat from radium particles. In 1903, the Curies shared the Nobel Prize in Physics with Becquerel. Three years later, Pierre died in what type of accident? Discuss