Sir Isaac Newton Sir Isaac Newton, the culminating figure in the scientific revolution of the 17th century, was born on December 25, 1642 (according to the Julian calendar then in use: the date was January 4, 1643, according to the Gregorian calendar in use today), in the manor house of Woolsthorpe, near Grantham Lincolnshire, England. Newton came from a family of modest yeoman farmers. His father died several months before he was born. Three years later his mother remarried and moved to a nearby village, leaving Isaac in the care of his maternal grandmother. Upon the death of his stepfather in 1656, Ne