Question: What was the focus of De Revolutionibus by Nicolaus Copernicus?
Sentence: The Scientific Revolution is traditionally held by most historians to have begun in 1543, when the books De humani corporis fabrica (On the Workings of the Human Body) by Andreas Vesalius, and also De Revolutionibus, by the astronomer Nicolaus Copernicus, were first printed.
Answer in sentence: no