Donald Glaser was an American physicist and Nobel laureate, born on September 21, 1926, in Cleveland, Ohio. He is best known for inventing the bubble chamber, a device that allows scientists to observe the behavior of charged particles in a liquid. This invention significantly advanced the field of particle physics and contributed to the discovery of various subatomic particles. In 1960, Glaser was awarded the Nobel Prize in Physics for his work on the bubble chamber. He later expanded his research interests to include neuroscience and biophysics, making significant contributions to our understanding of the brain and its functions. Glaser passed away on February 1, 2023.