Joan Hinton (Chinese name: 寒春, Pinyin: Hán Chūn; 20 October 1921 – 8 June 2010) was a nuclear physicist and one of the few women scientists who worked for the Manhattan Project in Los Alamos. She lived in the People's Republic of China after 1949, where she and her husband Erwin (Sid) Engst participated in China's efforts at developing a socialist economy, working extensively in agriculture. She lived on a dairy farm north of Beijing before her death on June 8, 2010. Early life On 20 October 1921, Hinton was born as Joan Chase Hinton in Chicago, Illinois. Her father, Sebastian Hinton, was a lawyer (who also was the inventor of the jungle gym); her mother, Carmelita Hinton, was an educator and the founder of The Putney School, an independent progressive school in Vermont. Family background Her sister, Jean Hinton Rosner (1917–2002), was a civil rights and peace activist. Joan Hinton's great-grandfather was the mathematician George Boole, and her grandfather was the mathematician Charles Howard Hinton. Ethel Lilian Voynich, a great-aunt, was the author of The Gadfly, a novel later read by millions of Soviet and Chinese readers. Education Hinton graduated from the Putney School, where her skiing skills qualified her for a berth on the 1940 U.S. Ski Team at the Winter Olympic Games, had they been held that year. She studied physics at Bennington College and graduated in 1942 with a bachelor's degree in natural science from Bennington College. In 1944, Hinton earned a doctorate in Physics from University of Wisconsin. Career Nuclear scientist Hinton was in Los Alamos for the Manhattan Project. Under the supervision of Enrico Fermi, she calibrated neutron detectors to be used in the Alamogordo test. She observed the Trinity test and wrote about it: It was like being at the bottom of an ocean of light. We were bathed in it from all directions. The light withdrew into the bomb as if the bomb sucked it up. Then it turned purple and blue and went up and up and up. We were still talking in whispers when the cloud reached the level where it was struck by the rising sunlight so it cleared out the natural clouds. We saw a cloud that was dark and red at the bottom and daylight at the top. Then suddenly the sound reached us. It was very sharp and rumbled and all the mountains were rumbling with