Isaac Newton Isaac Newton was one of the greatest scientists of all time. He is best-known for his discovery of the law of universal gravitation and the laws of motion. Much of modern science is based on the understanding and use of his laws. Isaac Newton was born on Christmas Day, 1642, in the small English town of Woolsthorpe. His father, a farmer, died shortly before Isaac was born. When the boy was three years old, his mother remarried and moved to another town. Isaac stayed on at the farm in Woolsthorpe with his grandmother. After attending small country school, he was sent at the age of twelve to the Kings School in the near by town of Grantham. At firs