Ancient Greek science refers to the systematic investigation of nature, mathematics, cosmology, medicine, and related fields conducted by thinkers in the Greek-speaking world from roughly the 6th century BC through the 6th century AD. It encompasses both the philosophical traditions that gave rise to natural inquiry and the more technical, empirical work in astronomy, biology, geometry, and medicine that followed. Often treated as a foundational period in the history of Western science, ancient Greek science is notable for its early attempts to explain natural phenomena through reason and observation rather than myth or divine intervention - though the degree to which it resembles modern science is itself a matter of debate among historians.

Greek scientific inquiry was not a unified enterprise. It included pre-Socratic speculation about the fundamental constituents of matter (water, fire, atoms, and so on), Platonic idealism that treated mathematical forms as more real than physical objects, Aristotelian natural philosophy based on systematic observation and categorization, Hellenistic mathematical and technical work exemplified by Euclid, Archimedes, and Eratosthenes, and the medical tradition associated with Hippocrates and later Galen. Astronomical work, including the geocentric models elaborated by Claudius Ptolemy, reached a level of mathematical sophistication that remained authoritative in Europe and the Islamic world for over a thousand years.

Greek thinkers also debated questions that remain live in philosophy of science: the relationship between theory and observation, the nature of causal explanation, the reliability of sensory experience, and the proper method of inquiry. These debates were not incidental to their science but often constituted it.

The tradition is conventionally traced from the Milesian philosophers of the 6th century BC - Thales, Anaximander, and Anaximenes - through the Hellenistic period centered on Alexandria, and into the Roman imperial era. A fuller account is available at Ancient Greek Science - History.

There is broad consensus among historians of science that ancient Greek thinkers made lasting contributions to mathematics, formal logic, astronomy, and natural philosophy, and that these contributions significantly influenced later Islamic, medieval European, and early modern science. The mechanisms, extent, and directness of that influence are subjects of ongoing scholarly work. See Ancient Greek Science - History Consensus for historiographical context.

The continuity view holds that ancient Greek science is a genuine precursor to modern scientific method - that its emphasis on rational explanation, empirical observation (especially in biology and medicine), and mathematical modeling represents an early but recognizable form of science. See Continuity Viewpoint.

The discontinuity view argues that Greek natural philosophy differed so fundamentally from modern science - in its indifference to controlled experiment, its entanglement with metaphysics, and its reliance on teleological explanation - that calling it “science” is anachronistic and misleading. See Discontinuity Viewpoint.

The sociological view situates Greek science within its social and political context, emphasizing that its practitioners were typically elite men with access to leisure, and that its content reflects particular class and cultural assumptions rather than a culturally neutral pursuit of truth. See Sociological Viewpoint.

The transmission view focuses on Greek science primarily as a body of texts transmitted, translated, and transformed through Syriac, Arabic, and Latin intermediaries, arguing that what is called “Greek science” is substantially a later construction shaped by medieval and Renaissance reception. See Transmission Viewpoint.

• Ancient Greek Science - History
• Ancient Greek Science - Debate
• Ancient Greek Science - History Consensus
• Claudius Ptolemy
• Nicolaus Copernicus
• De Revolutionibus
• Aristotle
• Hippocrates
• Hellenistic Science
• Islamic Golden Age Science
• History of Scientific Method

1. Lloyd, G. E. R. Early Greek Science: Thales to Aristotle. London: Chatto & Windus, 1970.
2. Lloyd, G. E. R. Greek Science After Aristotle. London: Chatto & Windus, 1973.
3. Lindberg, David C. The Beginnings of Western Science. 2nd ed. Chicago: University of Chicago Press, 2007.
4. Cuomo, Serafina. Ancient Mathematics. London: Routledge, 2001.
5. Russo, Lucio. The Forgotten Revolution: How Science Was Born in 300 BC and Why It Had to Be Reborn. Berlin: Springer, 2004.
6. Nutton, Vivian. Ancient Medicine. 2nd ed. London: Routledge, 2013.