Webum > Kids and Teens > School Time > Math > Mathematicians > Descartes, René Encarta: Descartes, René Encyclopedia articles summarizes his influence on math, philosophy, and science. René Descartes An eighth-grader introduces the man who said, "I think; therefore, I am." René Descartes Biography from the MacTutor History of Mathematics archive. Rene Descartés (1596-1650) Short profile along with links to some of his works. René Descartes' Life and Works Provides a detailed look at his life and writings. Help build the biggest human edited directory on the internet Add your website - Open Directory Project - Become an editor