Today (Wednesday, September 27), the world's most popular search engine, Google, becomes 25 years old. 

Google, which is far and away the most popular search engine, logs approximately 99,000 searches per second and 8.5 billion queries every day.

Google has released a new doodle in honor of its birthday, which features the numbers two and five in place of the letter 'oo' in the middle.

Additionally, if you put "Google 25th birthday" into the search bar, confetti will fall from the top of the screen.

Doodles on Google's homepage have been around for close to the same amount of time as the firm itself.

The original one was quite straightforward; it consisted of a stick figure superimposed over the search engine's logo in 1998, 

During the time that co-founders Larry Page and Sergey Brin were taking time off to attend the Burning Man Festival.

Although Google was established on September 4, 1998, the day that the firm chooses to honor as its birthday is September 27.

Larry Page and Sergey Brin, two American computer scientists, established the company when they were both pursuing doctoral degrees in computer science at Stanford University in California.