births
Harry Schmidt, German mathematician and physicist (died 1951)
Related Wikipedia articles
Harry Schmidt (mathematician)
Harry Schmidt was a German mathematician. Core areas of his research were experimental physics, as well as the theory of boundary layers and wings in aerodynamics.Source: Wikipedia (CC BY-SA)
June 21
Day of the year
June 21 is the 172nd day of the year in the Gregorian calendar; 193 days remain until the end of the year.Source: Wikipedia (CC BY-SA)