In celebration of Women’s History Month, the Department of Energy is honoring some of the nation's best and brightest women in the science, technology, engineering and math (STEM) community. In this 1949 photo, U.S. Geological Survey mineralogist Elaine Zworykin is shown with an electron microscope, a piece of technology developed by her father, Vladimir Zworykin. Elaine had been assigned to RCA laboratories to teach researchers how to use the microscope. | Photo courtesy of Smithsonian Institution Archives, Acc. 90-105 - Science Service, Records, 1920s-1970s.