It was in 1930 that Eugene Wigner joined the staff of Princeton on a halftime basis, at the age of 27, sharing a professorship with John von Neumann. Both were members of that remarkably illustrious group of students who had emerged almost as a team in Budapest and then accepted employment in Germany in the last great days of German science. Leo Szilard once confided to me that the group was really not composed of Hungarians but of Martians in disguise.