Ernst Mayr was born in Kempten, Germany, in 1904. He was one of the main architects of the modern synthesis of genetic and evolutionary theory whose career has spanned fields as diverse as ornithology, systematics, zoo-geography, evolutionary theory, and the philosophy and history of science. He has written 13 books, and published more than 700 scientific papers. Since 1953 he has been on the faculty of Harvard University, and, at the age of 96, continues to make the trip into work several days a week.