Theodore_von_Kármán--Hans_Albrecht_Bethe

Theodore von Kármán (Hungarian: (szőllőskislaki) Kármán Tódor [(søːløːʃkiʃlɒki) ˈkaːrmaːn ˈtoːdor], born Tivadar Mihály Kármán, 11 May 1881 – 6 May 1963), was a Hungarian-American mathematician, aerospace engineer, and physicist who worked in aeronautics and astronautics. He was responsible for crucial advances in aerodynamics characterizing supersonic and hypersonic airflow. The human-defined threshold of outer space is named the "Kármán line" in recognition of his work. Kármán is regarded as an outstanding aerodynamic theoretician of the 20th century.