id author title date pages extension mime words sentences flesch summary cache txt en-wikipedia-org-5107 Isaac Newton - Wikipedia .html text/html 17637 2299 69 Sir Isaac Newton PRS (25 December 1642 – 20 March 1726/27[a]) was an English mathematician, physicist, astronomer, theologian, and author (described in his own day as a "natural philosopher") who is widely recognised as one of the most influential scientists of all time and as a key figure in the scientific revolution. Newton's work has been said "to distinctly advance every branch of mathematics then studied."[23] His work on the subject usually referred to as fluxions or calculus, seen in a manuscript of October 1666, is now published among Newton's mathematical papers.[24] The author of the manuscript De analysi per aequationes numero terminorum infinitas, sent by Isaac Barrow to John Collins in June 1669, was identified by Barrow in a letter sent to Collins in August of that year as "[...] of an extraordinary genius and proficiency in these things."[25] ./cache/en-wikipedia-org-5107.html ./txt/en-wikipedia-org-5107.txt