List of Famous people who are 73

Timothy "Tim" A. Springer, Ph.D. is an immunologist and Latham Family Professor at Harvard Medical School. Springer is best known for his pioneering work in discovering the first integrins and intercellular adhesion molecules (ICAMs) and elucidating how these cell adhesion molecules function in the immune system. His innovative use of monoclonal antibodies in his research paved the way for the development of therapeutic antibodies, known as selective adhesion molecule inhibitors, to treat autoimmune diseases. In recent years, Springer's research interest has expanded to include malaria, transforming growth factor beta (TGF-β) signaling molecules, and von Willebrand factor.

Kiyomi Kato is a retired Japanese flyweight freestyle wrestler. He won a gold medal at the 1972 Olympics and a silver medal at the 1970 Asian Games and placed sixth at the 1971 World Wrestling Championships.

Catherine Ann Warner, is an Australian lawyer and legal academic serving as the 28th and current Governor of Tasmania since 2014.

Robert Anacletus Underwood is a Guamanian politician, educator, member of the Democratic Party of Guam, former Delegate from Guam to the United States House of Representatives from 1993 to 2003, and was the president of the University of Guam from 2008 to 2018.

Vincent E. Courtillot is an emeritus French geophysicist, prominent among the researchers who are critical of the hypothesis that impact events are a primary cause of mass extinction of life forms on the Earth. He is known for his book "La Vie en catastrophes", translated into English as "Evolutionary catastrophes" (1999).