Simon Flexner: his 'rock' was for the ages.
D000047:Academies and Institutes / Q000266:history; D049672:History, 19th Century; D049673:History, 20th Century; D008396:Maryland; D008829:Microbiology / Q000266:history; D009519:New York City; D010336:Pathology / Q000266:history; D012577:Schools, Medical / Q000266:history; D014481:United States