Dumas, Jean Baptiste Andre (1800-1884), a French chemist. He was noted for his researches in atomic weights, the composition and density of the atmosphere, and the theory of chemical types. Dumas studied in Geneva, Switzerland. In 1821 he went to Paris, where he served on the faculties of the College de France, Ecole de Medecine, and Ecole Centrale des Arts et Manufactures. He held several government posts.
One was a celebrated author, the other a famed physicist. What the two shared was a public exposure of their religious beliefs. Big E had an on-again, off-again relationship with God, while C.S. was an avowed atheist during his early years.
He is famous for a phrase he never said, for wearing turtlenecks and for hosting the original 'Cosmos' TV series. As enthusiastic about the stars as he was about marijuana, Carl Sagan led a very surprising life. Here are 10 cool facts.