The year 1666 is known as Newton's ''annus mirabilis'' (miraculous year—more precisely the two years 1665-1666), about twenty-four years of age. He later recalled, "For in those days I was in the prime of my age for invention & minded Mathematicks & Philosophy more than at any time since." (By "philosophy" he meant physics.) | The year 1666 is known as Newton's ''annus mirabilis'' (miraculous year—more precisely the two years 1665-1666), about twenty-four years of age. He later recalled, "For in those days I was in the prime of my age for invention & minded Mathematicks & Philosophy more than at any time since." (By "philosophy" he meant physics.) |