What scientifical events happened during the 1929 - 1942 era?

During the 1929-1942 era, significant scientific events included the discovery of insulin in 1921, which revolutionized Diabetes treatment, and the development of quantum mechanics, particularly through the work of scientists like Werner Heisenberg and Erwin Schrödinger. The 1938 discovery of nuclear fission by Otto Hahn and Fritz Strassmann laid the groundwork for nuclear energy and weapons. Additionally, the 1940s saw the rise of penicillin as a major antibiotic, thanks to Alexander Fleming's earlier work. This period also marked advancements in genetics with the establishment of foundational principles by Gregor Mendel being recognized.