small scales By natalie toro 1000 BCE Hominids appear 6 million years ago beginning of human life 276 BCE Eratosthenes 100 BCE 100 BCE 85 BCE Ptolemy 80 BCE 80 BCE 60 BCE 60BCE 40 BCE 40 BCE 20 BCE 20 BCE 1473 Copernicus 1500 1500 1546 Tycho Brahe 1561 Francis Bacon 1564 Galileo 1571 Johannes Kepler 1596 Rene Descartes 1600 1600 1632 John Locke 1643 Newton 1700 1700 1800 1800 1834 Mendeleev 1839 Hubble 1859 Curie 1868 Levitt 1880 Alfred Wegener 1900 1900 1906 Harry Hess