Newton was a genius. Like, actually, a literal genius. He invented calculus and the laws of motion. The guy could have done anything, but instead he decided to write 400 pages about the tides.
His most brilliant contribution to science was his theory of light and colors, which he proved using a prism, a piece of glass, and some really fancy math.
Read all about Newton's groundbreaking work on the laws of motion. Laugh at the absurdity of calculus. See a prism like Newton used, minus the risk of blindness.