Answer
Geiger counters, devices used to detect and measure radioactivity, were co-developed by physicist Walther Bothe and his student Herbert Becker in 1928. Their invention laid the foundation for the modern Geiger-Müller (GM) tube, a widely used radiation detection instrument. Years later, Elizabeth "Libby" Karle (1914-2002), an Austrian-American physicist and crystallographer, made significant contributions to our understanding of the structure and behavior of molecules.