Blaise Pascal

Blaise Pascal (1623 – 1662) was a French mathematician, physicist, inventor, writer, and Catholic theologian. He was a child prodigy who was educated by his father, a tax collector in Rouen.

Pascal’s earliest work was in the natural and applied sciences where he made important contributions to the study of fluids and clarified the concepts of pressure and vacuum by generalizing the work of Evangelista Torricelli. Pascal also wrote in defense of the scientific method.
Source: Wikipedia