Santiago Ramón y Cajal

Neuroscientist.

Santiago Ramón y Cajal (1 May 1852 – 17 October 1934) was a Spanish pathologist, histologist, neuroscientist, and Nobel laureate. His pioneering investigations of the microscopic structure of the brain were original: he is considered by many to be the father of modern neuroscience. He was skilled at drawing, and hundreds of his illustrations of brain cells are still used for educational purposes today.

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Sources:

1.) Carolyn Sattin-Bajaj (2010). Marcelo Suarez-Orozco. ed. Educating the Whole Child for the Whole World: The Ross School Model and Education for the Global Era. NYU Press. p. 165. ISBN 9780814741405. "In that sense, it was interesting to learn that Santiago Ramón y Cajal, the great pioneer of modern neuroanatomy, was agnostic but still used the term soul without any shame."

2.) John Brande Trend (1965). The Origins of Modern Spain. Russell & Russell. p. 82. "Cajal was a liberal in politics, an evolutionist in philosophy, an agnostic in religion..."