Check out William M. Mann's haircuts throughout his career:
William M. Mann had various haircuts during his career. He reached fame as an excellent zoologist and entomologist. However, the American entomologist and the fifth director of the National Zoo in Washington, D.C was particularly known for his special looks and his likable personality. Before his tragic demise at age 74 he was again and again talked about in the press due to his superb looks. Check out William M. Mann's famous haircuts right here: