A Brief History of Time on Two New Sciences: “It was this work, referred to as Two New Sciences, even more than his support for Copernicus, that was to be the genesis of modern physics.”
A Brief History of Time on Principia Mathematica: “Sir Isaac Newton published his Philosophiae Naturalis Principia Mathematica, probably the most important single work ever published in the physical sciences.”
A Brief History of Time on On the Heavens: “the Greek philosopher Aristotle, in his book On the Heavens, was able to put forward two good arguments for believing that the earth was a round sphere”