Manfred Steiner had a successful and productive career as a doctor, helping generations of medical students learn about hematology. But all along, he had a nagging feeling he should be doing something else: studying physics. At age 89, he has finally fulfilled that dream, earning his Ph.D. in physics from Brown University.
"It's my third doctorate, but this one I really cherish a lot. That I made it — and made it at this age," said Steiner, who is weeks from turning 90, in an interview with NPR.