Did you happen to visit Google today? We're all pretty used to holiday-themed variations on the official company logo, but today's Google logo celebrates an important milestone, especially for visually impaired people: the birthday of Louis Braille. The popular search engine has long used its logo to celebrate important birthdays, that of Vincent Van Gogh among my personal favourites. A little harmless nonsense that always brings pause for reflection before one begins frantically typing queries. Google has maintained this tradition since 1999, and you can find a full archive at their web site, along with a separate collection of logo variants created by Google fans.