Richard Feynman quotes (American theoretical physicist, 1918-1988)
Isaac Asimov quotes (Russian born American science-fiction Writer and Biochemist. 1920-1992)
William Bragg, Sr. quotes
Charles Pierce quotes (American Musical Actor and Comedian, famous for his female impersonations 1926-1999)
Albert Einstein quotes (German born American Physicist who developed the special and general theories of relativity. Nobel Prize for Physics in 1921. 1879-1955)
Dr. Carl Sagan quotes (American Astronomer, Writer and Scientist, 1934-1996)
Paul Dirac quotes (English theoretical physicist, 1902-1984)