Construction
Greek architect and engineer Eupalinus of Megara (Greece) [b. c. 570 bce] builds an aqueduct and water-supply system for Megara, although he is much more famous for the water supply system he later builds on Samos. See also 522 bce Construction.
Earth scienceGreek philosopher Xenophanes [b. Colophon, Ionia (Turkey), c. 570 bce, d. 480 bce] speculates that since fossil seashells are found on tops of mountains, the surface of Earth must have risen and fallen in the past. See also 550 bce Biology; 350 bce Earth science.
PhysicsGreek philosopher Anaximenes of Miletus [b. Miletus (Turkey), c. 570 bce, d. c. 500 bce] suggests that air is the primary substance -- it can be changed into other substances by thinning, forming fire; or thickening, forming wind, clouds, rain, hail, earth, and rock. He recognizes that the rainbow is a natural phenomenon rather than a divine one. See also 585 bce Physics.




