Theodore von Kármán, Hungarian-American mathematician, physicist, and engineer (died 1963)

Theodore von Kármán 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.

May 11 is the 131st day of the year in the Gregorian calendar; 234 days remain until the end of the year.