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4. The Guardian turns to tweet-like articles
Twitter was already relatively popular by 2009 but was far from the platform that it is today. It was enough for London-based newspaper The Guardian to defect to a microblogging platform after 188 years of printed publications. The project would have involved rewriting the entire newspaper's archive, dating back to 1831, in 140 character tweets. "OMG Hitler invades Poland, allies declare war," was one example given.