Edmund B. (Edmund Beecher) Wilson

Born in Geneva, Illinois, in 1856, Edmund Beecher Wilson became one of the most influential American biologists of his era. He studied at Yale and Johns Hopkins, and later taught at Bryn Mawr before joining Columbia University in 1891, where he built a major center for zoology and biological research.

Wilson is especially remembered for his work in cytology and embryology, and for helping establish the importance of chromosomes in heredity. He is widely associated with the discovery of the XY sex-determination system, and his landmark book The Cell in Development and Inheritance became a foundational text in modern biology.

Beyond his own research, Wilson was known as a gifted teacher and a central figure in the growth of American biology in the late nineteenth and early twentieth centuries. He died in 1939, but his influence remained strong through the scientists he taught and the ideas he helped bring into focus.