Aristotle says that a hundred-pound ball falling from a height of one hundred cubits hits the ground before a one-pound ball has fallen one cubit. I say they arrive at the same time. You find, on making the test, that the larger ball beats the smaller one by two inches. Now, behind those two inches you want to hide Aristotle’s ninety-nine cubits and, speaking only of my tiny error, remain silent about his enormous mistake.

– Galileo Galilei, Dialogue Concerning Two New Sciences (1638)

Note: a cubit is about 20 inches, so Aristotle’s 99-cubit error to Galileo’s two-inch error simplifies to a 990:1 ratio.