1948
On March 9, 1948, researchers at Berkeley announce the artificial production of mesons using a cyclotron, confirming that high-energy particles associated with cosmic phenomena could also be created in the laboratory.
1954
Vagn Walfrid Ekman dies on March 9, 1954. The Swedish oceanographer developed the Ekman spiral and transport theory, concepts that remain fundamental to physical oceanography.
1962
Howard T. Engstrom dies on March 9, 1962. The American computer scientist helped develop early digital computers and contributed to the UNIVAC project, an important milestone in commercial computing.