William Ernest Castle

1867–1962 (age 95)

geneticist/biologist

Biography

William Ernest Castle devoted his life to advancing the study of heredity and evolution, shaping the emerging field of genetics through his work at Harvard University and his mentorship of generations of biologists. His careful breeding experiments with mammals and his insistence on rigorous observation helped lay the foundations for modern genetics.

He was also known for his collegial spirit and generosity toward students and colleagues, often encouraging young scientists to think critically about the implications of their discoveries while remaining grounded in compassion.

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