A Look At Google's Ever-Changing Logos

Google wished itself a happy 11th birthday Sunday by adding an extra "l" or "1" to its logo, making the double "l's" look like the number 11. Google occasionally goofs around with its logo to celebrate certain holidays or other milestones. Here's a look at some of Google's handiwork.

Just last week, Google users in the U.K. found their Google logo cut out in crop circles, the mysterious phenomenon known to show up in farmland. At first, Google was mum on the meaning behind the change, but later said it was to celebrate science-fiction author H.G. Wells' birthday 143 years ago.

Google spelled its name using Dr. Seuss characters, including The Cat in the Hat and the Grinch, last March 2 to celebrate the famed children's author's birthday.

Google celebrated the first day of spring with letters inspired by another children's author, Eric Carle, and "The Very Hungry Caterpillar."

Three-leafed clovers sprouted from Google's logo last March 17, a logo designed by a contest winner.

Rene Margritte's 110th birthday let Google fuse its logo with the artist's "Golconde" and "The Son of Man."

Google highlighted Election Day last year by showing some letters in voting booths behind curtains. With two blue letters and two red letters (plus one "Green Party" voter), we're guessing the yellow O cast the deciding vote for Obama.

Google has created Halloween logos for years, but last year's version was created by horrormeister Wes Craven.

Google celebrated the 250th birthday of Wolfgang Amadeus Mozart on Jan. 27, 2006, by turning its second "g" into a G-clef and its second "o" into a period wig.

The company celebrated Louis Braille's birthday on Jan. 4, 2006, by using the Braille alphabet to spell its name.