We've had Twitter for a decade. Crazy, right? As the social network celebrates its 10th birthday today, it's easy to forget that it hasn't always just been there, waiting for us every morning and during every major, televised event. Today, Twitter is a relentless firehose of news headlines, jokes, GIFs, hot takes, snark, and whatever Kayne West happens to be thinking. At its best, it's helped fuel revolutions and allowed the world to experience major sporting events together.