Especially Europe has been rediscovering the knowledge from the Greeks and from the Romans. And as they enter into the 16th century, they start to go beyond the knowledge of the Greeks and the Romans. In 1543, Nicolaus Copernicus publishes On the Revolutions of the Heavenly Spheres, famous for suggesting that Earth is not the center of the universe, but that the Earth revolves around the sun. What was powerful about this is it challenged centuries-old ideas about how the universe worked. And at a meta level, it was about using new methods and evidence in order to make conclusions no matter how revolutionary those conclusions might be. And this publication is often cited as the beginning of what will be known as the Scientific Revolution. Many people view the capstone of the Scientific Revolution to be Newton's publication of Principia in 1687.