This course explains how the philosophic ideas of Ancient Greece influenced the development of the natural sciences. It shows how rational ideas in metaphysics and epistemology establish a fertile context for scientific thinking, and, conversely, how irrational philosophy undermines scientific methodology. Mr. Norsen presents the respective influences of Thales, Pythagoras, Plato, and Aristotle on diverse scientific fields from physics to biology. Specific topics include: the metaphysics underlying Thales' rejection of religion; proper and improper roles of mathematics in physics; the false dichotomy of chaos vs. creationism; and the light-shedding relevance of Greek science to the problems in contemporary physics.