Newton never mentioned an apple falling from a tree until 40 years after his discovery of the law of gravity
Everyone knows the story of Newton and the falling apple. His key insight was that the apple and the Moon both fall under gravity (the Moon, because of its sideways velocity, never gets any closer). By comparing their rates of fall, he deduced the inverse-square law – that the force between bodies is four times as weak when they are twice as far apart, and so on. But the first time Newton told the story of the apple was to his biographer, William Stukeley, four decades after discovering the law of gravity. Perhaps, with his creative days behind him, he was concocting his own legend. Certainly, the story depicts Newton as the lone genius struck by a flash of inspiration.
The falling apple story is probably the result of some creative licence on Newton’s part