In Science before Socrates, Daniel Graham argues against the prevalent belief that the Presocratic philosophers did not produce any empirical science and that the first major Greek science, astronomy, did not develop until at least the time of Plato. Instead, Graham proposes that the advances made by Presocratic philosophers in the study of astronomy deserve to be considered as scientific contributions. Whereas philosophers of the sixth century BC treated astronomical phenomena as ephemeral events continuous with weather processes, those of the fifth century treated heavenly bodies as independent stony masses whirled in a cosmic vortex. Two historic events help to date and account for the change: a solar eclipse in 478 BC and a meteoroid that fell to earth around 466. Both events influenced Anaxagoras, who transformed insights from Parmenides into explanations of lunar and solar eclipses, meteors, and rainbows. Virtually all philosophers came to accept Anaxagoras' theory of lunar light and eclipses. Aristotle endorsed Anaxagoras' theory of eclipses as a paradigm of scientific explanation. Anaxagoras' theories launched a geometrical approach to astronomy and were accepted as foundational principles by all mathematical astronomers from Aristarchus to Ptolemy to Copernicus and Galileo-and to the present day.

CONTENTS Introduction: Cosmic Conjunctions 1 Looking for Science 1.1 Unfounded speculation 1.2 Footnotes to Thales 1.3 Footnotes to Pythagoras 1.4 Science without knowledge 1.5 History of science without history 1.6 History of science without science 1.7 Old-time history of science Notes 2 Azure Pastures: An Early Ionian Model 2.1 Hesiod's mythical cosmography 2.2 Ionian theories 2.3 The Meteorological Model Notes 3 Borrowed Light: The Insights of Parmenides 3.1 Fifth-century advances 3.2 Three insights: Heliophotism, planetary unification, sphericity 3.3 The power of a model 3.4 Conjectures 3.5 Conceptual advances Notes 4 Empire of the Sun: Implications of Heliophotism, and a New Model 4.1 Antiphraxis and other theoretical implications 4.2 A new physics 4.3 Anaxagoras' new cosmology and astronomy 4.4 The Lithic Model Notes 5 Darkened Suns and Falling Stars: Heaven-sent Proofs 5.1 Lives of the eminent philosophers 5.2 Eclipses 5.3 The meteor 5.4 The comet 5.5 The Nile floods Notes 6 Lunar Revolutions: The Triumph of the New Astronomy 6.1 A community effort 6.2 Anaxagoras' theory 6.3 Other theories of the fifth century 6.4 Characteristics of the Lithic Model 6.5 The doxography 6.6 Plato's heavenly sphere 6.7 Aristotle's paradigm 6.8 A scientific consensus Notes 7 The Geometry of the Heavens 7.1 The story of early Greek astronomy 7.2 Scientific Progress 7.3 Historical and Philosophical Significance Notes Appendix 1: Anaxagoras in the Historiography of Science Notes Appendix 2: Science and History Notes Bibliography