Researchers from Carnegie Mellon University say regional differences may even be finding space to evolve within Twitter. Computer scientist Jacob Eisenstein and his colleagues looked for geotagged tweets—messages that were marked with their tweeter’s location. They collected one week’s worth of messages in March 2010 from people who tweeted at least 20 times during that week. That gave them a whopping 380,000 tweets from 9,500 users. The researchers found that well-known regionalisms were thriving on Twitter.