At what age did Newton encounter and fell in loved with mathematics? I was really surprised when some sources said that he learned trigonometry during his college years and that he didn't really read Euclid's elements until after 1663.(http://www-groups.dcs.st-and.ac.uk/~history/Biographies/Newton.html) I would think a genius like Newton would have encountered and study mathematics early on in life,like mastering the most advanced math of his time by like 8 or 9 years old. Especially since he created the differential party of calculus a few years later. I am unable to check out a book on Newton's biography , so could someone in PF who possesses more knowledge than I enlighten me on when NEwton became greatly interested in mathematics?