Isaac Newton was a renowned physicist and mathematician who lived in the 17th century. He is widely regarded as one of the most influential scientists of all time, and his work laid the foundations for modern physics. He is best known for his laws of motion and universal gravitation, which form the basis of classical mechanics. He also made important contributions to optics, mathematics, and astronomy. His work has had a lasting impact on science and technology, and he is remembered as one of the greatest scientists in history.