Sir Isaac Newton Sir Isaac Newton was born on January 4th 1643. He lived in Woolsthorpe England. He was the most important scientist at that time even Albert Einstein said that he was the best scientist. He became famous for his work on gravity and his three laws of motion. He was also well known for his work on light and colour The famous story of an apple falling to the ground from a tree shows how his work on gravity was inspired by things he observed in the world around him.