Louis Slotin (1911–1946) died on May 30, 1946, at age 35. Slotin was a widely respected and talented Canadian physicist known for his work on the Manhattan Project, as well as his pioneering contributions to the field of radiation safety. Slotin was born on December 1, 1911 in Winnipeg, Canada, to a family of Jewish immigrants from Russia. He graduated from Science at the University of Manitoba in 1933, and subsequently worked at a variety of institutions, including the National Research Council of Canada, the University of Chicago, and the Los Alamos Scientific Laboratory. It was at Los Alamos that Slotin made his greatest contribution to science – the development of procedures to safely and efficiently work with nuclear materials. A distinguished, accomplished scientist, Louis Slotin was highly regarded by his peers. He was admired for his inquisitive, creative, and brilliant mind. Even President Harry S. Truman issued a statement commended Slotin's invaluable work and contribution to the field of physics. Louis Slotin's life was tragically cut short when, on May 30, 1946, he was killed by a nuclear accident while conducting an experiment with plutonium at Los Alamos. He was 35 years old. He is survived by his parents, Sara and Sam, and his two siblings.