A physicist.[ref]
https://www.colgate.edu/academics/departments-programs/department-physics-and-astronomy/physics-and-astronomy-news-and-21. Title and opening paragraphs: name, birth year, nuclear-physics doctorate; career and teaching paragraphs
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Charles H. Holbrow is a physicist known for his contributions to the field of physics education and research. He has worked on various topics within physics, and is often recognized for his efforts in promoting effective teaching methods and fostering a deeper understanding of physics among students. Holbrow has also been involved in writing textbooks and educational materials aimed at both undergraduate and graduate levels.