Donald Glaser, American physicist, with his apparatus, c 1953.

UNITED KINGDOM - MAY 14: Donald Glaser (b 1926) is an American physicist credited with inventing the bubble chamber. Glaser studied under Carl Anderson (1905-1991) in the late 1940s. He then moved to Michigan Unviersity where he developed the bubble chamber. In 1959 he moved to the University of California at Berkeley where he initially concentrated on high energy particle physics, but later turned to molecular genetics and neurobiology. In 1988 he became professor of molecular and cell biology as well as professor of physics at Berkeley. (Photo by SSPL/Getty Images)