Maria Curie Background Hello,my name is Yuki Wada and today I'd like to talk about Maria Curie and her work to discover Polonium and Radium. Polonium and Radium has a long history.Wilhelm conrad Rontgen discovered ray which we can't see wgile he was doing a discharge test in 1895.This ray denominated as X-ray.At the same time, Becquerel ascertained that uranium had a ray similar to X-ray. Research Question The Curie thought which element has Becquerel ray.