Marking the special occasion, Google unveiled a special doodle on
its homepage. The doodle shows all the previous logos of the company and ends
with the letters ‘oo’ replaced by ‘25’ in the word Google. The search engine
giant was founded by Larry Page and Sergey Brin in September 1998, as part of a
PhD project. The two ideated the firm in 1995. By 1996, they had reportedly
built a search engine, initially called BackRub that used links to determine
the importance of individual web pages.
