USPS issued a stamp honoring professor Chien-Shiung Wu who is regarded as one of the most influential nuclear physicists of the 20th century. She greatly contributed to the development of the physical sciences, changing the physical theory forever. The stamp shows a detailed portrait of Wu wearing a black-and-white high-collared traditional Chinese gown known as qipao. Art director Ethel Kessler designed the stamp with original art by Kam Mak.
Wu Jianxong was an American radio physicist of Chinese descent. She participated in the Manhattan Project (enrichment of uranium fuel), conducted the famous “Wu Experiment”, which proved non-preservation of spatial parity in weak interactions. Her contributions to the experimental process of splitting and harnessing the power of the uranium atom made possible the production of the world’s first atomic bomb.
“It is a privilege to represent the U.S. Postal Service as we honor the life and achievements of Dr. Chien‑Shiung Wu,” said dedicating official Kristin Seaver, chief retail and delivery officer and executive vice president, U.S. Postal Service. “And, we believe that today, the International Day of Women and Girls in Science, is perfect timing for this dedication.”
“I am elated to have my mother honored by USPS on a postage stamp because I believe it goes beyond recognizing her scientific achievements; it also honors the determination and moral qualities that she embodied,” said Vincent Yuan, Vincent Yuan, a scientist at the Los Alamos National Laboratory and son of the honoree. “It's even more profound that the recognition comes from America, the country of her naturalization that she loved.”
