Title: Isaac Newton
Content:  Sir Isaac Newton (25 December 1642 – 20 March 1726/27) was an English mathematician, physicist, astronomer, theologian, and author (described in his time as a "natural philosopher") widely recognised as one of the greatest mathematicians and physicists of all time and among the most influential scientists. He was a key figure in the philosophical revolution known as the Enlightenment. His book Philosophiæ Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy), first published in 1687, established classical mechanics. Newton also made seminal contributions to optics, and shares credit with German mathematician Gottfried Wilhelm Leibniz for developing infinitesimal calculus. In Principia, Newton formulated the laws of motion and universal gravitation that formed the dominant scientific viewpoint until it was superseded by the theory 
Title: East Midlands
Content:  Isaac Newton, born in Grantham in 1642, is perhaps the most prolific scientist. His accomplishments include calculus, Newton's laws of motion, and Newton's law of universal gravitation, among many others. There is a shopping centre named in his honour in Grantham. Thomas Simpson from Leicestershire is known for Simpson's rule. Roger Cotes invented the concept of the radian in 1714, but the term was not so-named until 1873. Henry Cavendish, loosely connected with Derbyshire, discovered hydrogen in 1766 (although the element's name came from Antoine Lavoisier), and Cavendish was the first to estimate an accurate mass of the Earth in 1798 in his Cavendish experiment. The Cavendish Laboratory at the University of Cambridge 
Title: History of physics
Content:  The late 17th and early 18th centuries saw the achievements of Cambridge University physicist and mathematician Sir Isaac Newton (1642-1727). Newton, a fellow of the Royal Society of England, combined his own discoveries in mechanics and astronomy to earlier ones to create a single system for describing the workings of the universe. Newton formulated three laws of motion which formulated the relationship between motion and objects and also the law of universal gravitation, the latter of which could be used to explain the behavior not only of falling bodies on the earth but also planets and other celestial bodies. To arrive at his results, Newton invented 
Title: Isaac Newton in popular culture
Content:  Isaac Newton was an English mathematician, natural philosopher, theologian, alchemist and one of the most influential scientists in human history. His Philosophiae Naturalis Principia Mathematica is considered to be one of the most influential books in the history of science, laying the groundwork for most of classical mechanics by describing universal gravitation and the three laws of motion. In mathematics, Newton shares the credit with Gottfried Leibniz for the development of the differential and integral calculus. Because of the resounding impact of his work, Newton became a science icon, as did Albert Einstein after publishing his theory of relativity more than 200 years later. Many books, plays, and films focus on Newton or use Newton as a literary device. Newton's stature among scientists remains at the very top rank, as demonstrated by a 2005 survey of scientists in Britain's Royal Society (formerly headed by Newton) asking who had the greater effect on the history of science, Newton or Albert Einstein. Newton was deemed the more influential. In 1999, leading physicists voted Albert Einstein "greatest physicist ever"; Newton was the runner-up.
Title: Isaac Newton (agriculturalist)
Content:  Isaac Newton (March 31, 1800 – June 19, 1867) was an agriculturalist who became the first United States Commissioner of Agriculture.
Title: Annus mirabilis
Content:  In 1666 Isaac Newton, aged 23, made revolutionary inventions and discoveries in calculus, motion, optics and gravitation. It was in this year that Newton was alleged to have observed an apple falling from a tree, and in which he in any case hit upon the law of universal gravitation (Newton's apple). He was afforded the time to work on his theories due to the closure of Cambridge University by an outbreak of plague.
Title: History of science
Content:  In 1687, Isaac Newton published the Principia Mathematica, detailing two comprehensive and successful physical theories: Newton's laws of motion, which led to classical mechanics; and Newton's law of universal gravitation, which describes the fundamental force of gravity.
Title: Isaac Newton
Content:  Street, through whom he learned of Kepler's work. He set down in his notebook a series of "Quaestiones" about mechanical philosophy as he found it. In 1665, he discovered the generalised binomial theorem and began to develop a mathematical theory that later became calculus. Soon after Newton had obtained his BA degree in August 1665, the university temporarily closed as a precaution against the Great Plague. Although he had been undistinguished as a Cambridge student, Newton's private studies at his home in Woolsthorpe over the subsequent two years saw the development of his theories on calculus, optics, and the law of gravitation. In April 1667, he returned to Cambridge and in October was elected as a 
Title: Early life of Isaac Newton
Content:  he was still a schoolboy. In June 1661, he was admitted to Trinity College, Cambridge as a sizar—a sort of work-study role. At that time, the college's teachings were based on those of Aristotle, whom Newton supplemented with modern philosophers such as Descartes and astronomers such as Copernicus, Galileo, and Kepler. In 1665, he discovered the generalised binomial theorem and began to develop a mathematical theory that later became infinitesimal calculus. Soon after Newton had obtained his degree in August 1665, the University closed down as a precaution against the Great Plague of London. Although he had been undistinguished as a Cambridge student, Newton's 
Title: Early life of Isaac Newton
Content:  visit, Halley noted the remarkable development Newton had conducted regarding the path of object in space such as stars and planets. Newton was convinced to step forward and introduce his findings to the general public which soon became publicized. The publication, "Mathematical Principles of Natural Philosophy" introduced the three laws that Newton became famous for: law of inertia, summation of forces equals mass multiplied by acceleration and every action has an equal and opposite reaction. Prior to Newton, there were several other philosophers who proposed ideas to describe the motion of celestial bodies. Kepler and Galileo Galilei often studied the way objects 

Question: who was isaac newton and what did he do?
Answer: Mathematician.