Chien-Shiung Wu (1912–97) was a particle physicist renowned for her meticulous experimental designs. She led the first tests that demonstrated photon entanglement and the violation of parity symmetry in weak interactions. To read about some of Wu’s most notable experiments, turn to the feature by Chon-Fai Kam, Cheng-Ning Zhang, and Da Hsuan Feng on page 28 . (Photo courtesy of the AIP Emilio Segrè Visual Archives, Physics Today Collection.)