Experiment on the Leaning Tower: The following is a dialogue taken from the first to seventh paragraphs of the text. Based on this, please explain why he made discoveries and innovations?

Galileo was the first scientist to introduce experiments into mechanics because he had a keen observation of things. Between 1589 and 1591, Galileo made detailed observations of the motion of falling bodies. Experimentally and theoretically, Aristotle's "law of falling bodies" that has ruled for more than a thousand years has been denied, and the correct "law of free fall" has been established, that is, when air resistance is ignored, balls with different weights will land at the same time when they fall. , the speed of falling has nothing to do with weight. So I did such an experiment to prove my theory