3.Sir Issac Newton (1643-1727)
Newton is known for his law of gravitation.He was born in Woolsthrope,England in 1643.Though being a poor student in school he loved making mechanical toys.Newton invented calculus and explained the theory of gravity and gravitation. 
He also explained the theory on tides which occurred due to the gravitation pull from the sun,moon and the earth.He invented three laws of motion and reflecting telescope.Newtons laws can be found in different field of mechanics,optics and chemistry. He was given the title sir by Queen Anne in 1705 and died in 1727 at the age of 84.