Changing Timelines By semcl919 276 BCE Eratosthenes Birth 240 BCE Eratosthenes measures circumference of the Earth 194 BCE Eratosthenes Death 85 Ptolemy birth 127 Ptolemy begins observing solar system and stars 140 Ptolemy develops Geocentric view 141 Ptolemy makes last observations of solar system 165 Ptolemy death Feb 19, 1473 Copernicus birth 1502 Copernicus notices contradictions between Aristotle's theory of the solar system and Ptolemy's explanation using eccentric orbits and epicycles 1514 Copernicus finished writing Little Commentary, expounds heliocentric theory 1532 Copernicus completes On the Revolutions of the Celestial Spheres May 24, 1543 Copernicus death Feb 15, 1564 Galileo birth 1609 Galileo invents first telescope 1610 Galileo discovers Jupiter 1632 Galileo publishes first book 1637 Galileo's second book Jan 8, 1642 Galileo death Jan 4, 1643 Newton birth 1687 Newton publishes first book 1703 Newton becomes president of the Royal Society 1704 Newton publishes second book Mar 31, 1727 Newton death Feb 12, 1809 Darwin Birth Feb 8, 1834 Mendeleev Birth 1835 Darwin goes on voyage to Galapagos Nov 24, 1859 Darwin publishes On the Origin of Species 1861 Mendeleev wrote "Organic Chemistry" Nov 7, 1867 Curie Birth 1868 Mendeleev published the first edition of "Principles of Chemistry" about inorganic chemistry 1869 Mendeleev had a dream of the periodic table 1870 Mendeleev's idea of the periodic table is stolen by Julius Lother Meyer Nov 1, 1880 Wegner Birth Apr 19, 1882 Darwin Death 1893 Curie gets degree in Physics 1895 Wilhelm Roentgen Discovers X-rays 1898 Discovers "polonium" and later "radium" two highly radioactive elements 1903 Curie and her husband receive Nobel Prize in physics May 24, 1906 Hess' Birth Feb 2, 1907 Mendeleev Death 1911 Curie receives second Nobel Prize in chemistry 1915 Wegener publishes The Origin of Continents and Oceans Jun 8, 1916 Crick Birth Jul 25, 1920 Franklin Birth Apr 6, 1928 Watson Birth 1930 Wegner Death Jul 4, 1934 Curie Death 1950 Pauling starts x-ray crystallography (early 1950s) 1953 Wilkins shows diffraction image to Watson 1953 Watson and Crick publish A Structure for Deoxyribose Nucleic Acid Apr 16, 1958 Franklin Death 1962 Hess publishes History of Ocean Basins discusses theory of "seafloor spreading" 1963 Geophysicists realize that Earth's magnetic field has reversed polarity numerous times Sep 25, 1969 Hess' Death Jul 28, 2004 Crick Death