Google marks 21st birthday with photo doodle dated Sept 27, 1998

Google marked its 21st birthday on Friday with a doodle of a photograph with the search engine on a computer, dated September 27, 1998. Google was incorporated on September 4, 1998, by Stanford PhD students Larry Page and Sergey Brin. The duo had published a paper about launching a prototype of a "large-scale search engine" 21 years ago, Google wrote.