This document provides an overview of the history of science from ancient Egyptian times through the 1600s AD. It discusses key early scientists and their contributions, including Thales, Democritus, and Aristotle in ancient Greece; Ptolemy's geocentric model of the universe; the stagnation of scientific progress during the Dark Ages; and the proposals of Copernicus and Galileo that challenged the Ptolemaic system. A turning point was the scientific revolution in the 1500-1600s led by figures like Copernicus, Galileo, and Newton, who developed the laws of motion and gravity and helped establish the scientific method.