general migration from unmoderated usenet to moderated web forums, most prominently AlternateHistory.com, the self-described "largest gathering of alternate history fans on the internet" with over 10,000 active members. In addition to these discussion forums, in 1997 Uchronia: The Alternate History List was created as an online repository, now containing over 2,900 alternate history novels, stories, essays, and other printed materials in several different languages. Uchronia was selected as the Sci Fi Channel's "Sci Fi Site of the Week" twice. See also 20th century in science fiction Alien space bats Alternate ending Alternative future American Civil War alternate histories Dieselpunk Dystopian Fictional universe Future history The Garden of Forking Paths Historical revisionism Hypothetical Axis victory in World War II Invasion literature Jonbar hinge List of alternate history fiction Possible worlds Pulp novels Ruritanian romance References Further reading Chapman, Edgar L., and Carl B. Yoke (eds.). Classic and Iconoclastic Alternate History Science Fiction. Mellen, 2003. Collins, William Joseph. Paths Not Taken: The Development, Structure, and Aesthetics of the Alternative History. University of California at Davis 1990. Darius, Julian. "58 Varieties: Watchmen and Revisionism". In Minutes to Midnight: Twelve Essays on Watchmen. Sequart Research & Literacy Organization, 2010. Focuses on Watchmen as alternate history. Cowley, Robert, ed., What If? Military Historians Imagine What Might Have Been. Pan Books, 1999. Gevers, Nicholas. Mirrors of the Past: Versions of History in Science Fiction and Fantasy. University of Cape Town, 1997 Hellekson, Karen. The Alternate History: Refiguring Historical Time. Kent State University Press, 2001 Keen, Antony G. "Alternate Histories of the Roman Empire in Stephen Baxter, Robert Silverberg and Sophia McDougall". Foundation: The International Review of Science Fiction 102, Spring 2008. McKnight, Edgar Vernon, Jr. Alternative History: The Development of a Literary Genre. University of North Carolina at Chapel Hill, 1994. Morgan, Glyn, and C. Palmer-Patel (eds.). Sideways in Time: Critical Essays on Alternate History Fiction. Liverpool University Press, 2019. Nedelkovh, Aleksandar B. British and American Science Fiction Novel 1950–1980 with the Theme of Alternative History (an Axiological Approach). 1994 , 1999 . Rosenfeld, Gavriel David. The World Hitler Never Made: Alternate History and the Memory of Nazism. 2005 Rosenfeld, Gavriel David. "Why Do We Ask 'What If?' Reflections on the Function of Alternate History." History and Theory 41, Theme Issue 41: Unconventional History (December 2002), 90–103. . Schneider-Mayerson, Matthew. "What Almost Was: The Politics of the Contemporary Alternate History Novel". American Studies 30, 3–4 (Summer