Twitterature (a portmanteau of Twitter and literature) is a literary use of the microblogging service of Twitter. It includes various genres, including aphorisms, poetry, and fiction (or some combination thereof) written by individuals or collaboratively. The 280-character maximum imposed by the medium, upgraded from 140 characters in late 2017, provides a creative challenge. Aphorisms are popular because their brevity is inherently suited to Twitter. People often share well-known classic aphorisms on Twitter, but some also seek to craft and share their own brief insights on every conceivable topic. Boing Boing has described Twitter as encouraging "a new age of the aphorism", citing the novel aphorisms of Aaron Haspel. Haiku are a brief poetic form well suited to Twitter; many examples can be found using the hashtag #haiku. Other forms of poetry can be found under other hashtags or by "following" people who use their Twitter accounts for journals or poetry. For example, the Swedish poet and journalist Göran Greider tweets observations and poems using the Twitter handle @GreiderDD (Göran Greider) as shown in the example on the right. Twitterature fiction includes 140-character stories, fan fiction, the retelling of literary classics and legends, twitter novels, and collaborative works. The terms "twiction" and "tweet fic" (Twitter fiction), "twiller" (Twitter thriller), and "phweeting" (fake tweeting) also exist to describe particular twitterature fiction genres. 140-character stories: fiction that fits into a single tweet. An example of these stories are those written by James Mark Miller (@asmallfiction), Sean Hill (@veryshortstories), and Arjun Basu (@arjunbasu). A number of Twitter journals dedicate themselves to the form. In 2013, The Guardian challenged traditionally published authors such as Jeffrey Archer and Ian Rankin to write their 140-character stories, and then featured their attempts. Fan fiction: Twitter accounts that have been created for characters in films, TV series, and books.