French chemist and physicist who, with his wife Marie Curie discovered uranium, polonium, and radium in pitchblende in 1898. He also noticed that permanent magnets lose their magnetism when heated above a certain temperature (now called the Curie temperature ). He also discovered piezoelectricity, which is the production of an electric potential across a crystal when pressure is applied.

Curie (Marie), Joliot-Curie (Frederic), Joliot-Curie (Irene)