The Key Events in Scientific History By vickitsa Apr 23, 1858 Max Planck, the father of Quatum Theory is born Jan 1, 1896 Marie and Pierre Curie begin to study Radioactivity Jan 1, 1897 Jospeh John Thomson discovered the electron Jul 1, 1898 Marie and Pierre Curie discovered Polonium Dec 1, 1898 Marie and Pierre Curie discovered Radium Jan 1, 1900 4th Century: Democritus discovered the Atomic Theory for the Cosmos Jan 1, 1916 Albert Einstein published his paper on General Relativity Jan 1, 1920 Ernest Rutheford proposed the existance of the neutron Jan 1, 1925 Wolfgang Pauli discovered the Pauli Exclusion Principle Jan 1, 1932 Carl D. Anderson discovered the Positron Jan 1, 1932 James Chadwick discovered the neutron Jan 1, 1935 Hideki Yukawa proposed a new theory of nuclear forces Sep 7, 1942 Gabriele Veneziano was born Period: Sep 7, 1942 to Jul 30, 2010 Gabriele Veneziano Jan 1, 1968 Gabriele Veneziano discovered the formula from which the String Theory was developed Jan 1, 1970 The String Theory was being further developed.
