Scientific Method.

For centuries, people based their beliefs on their interpretations of what they saw going on in the world around them without testing their ideas. People would read the bible for answers to all there questions. The Greek and Christianity believed that the earth was located at the center of the universe and that other planets revolved around it. Aristotle theory was that heavy object reached the land faster than a lighter object. His theory was believed by people for 1500 years. Years later they conducted an experiment and found out that there observations were not true. The questioning of everything and how things worked was later solved by the Scientific Revolution.