Isaac Newton discovered gravity
Isaac graduated from university in 1665. An epidemic known as the Great Plague of London broke out shortly after. Rats spread the disease, commonly known as bubonic plague. The university where Isaac taught had to close briefly due to the disease in order to contain it. He returned to Woolsthorpe after packing his belongings.
He used his time away from university to continue his research in mathematics, optics, and gravitation that he had begun at Cambridge. Isaac's most influential discoveries are thought to have occurred during this two-year sabbatical.
He was in his mother's garden when he noticed an apple that had fallen from a tree. This was the catalyst for him to develop his theory of universal gravitation. The same force that drew the apple also drew the moon, according to Isaac Newton. One of his most essential discoveries was based on this. Although it has been claimed that the apple story is a legend, Newton himself frequently repeated it and his acquaintances confirmed the incident, though not the cartoon version that the apple actually hit Newton's head.