"Alternate history (also alternative history, allohistory, althist, or AH) is a genre of speculative fiction in which one or more historical events have occurred but are resolved differently than in actual history."
A subgenre of science fiction or fantasy that explores what might have happened if key events in history had taken a different course.
"Some alternate histories are considered a subgenre of literary fiction, science fiction, or historical fiction."
"Alternate history stories propose What if? scenarios about crucial events in human history."
"Alternate history stories present outcomes very different from the historical record."
"Time travel between histories, the psychic awareness of the existence of an alternative universe by the inhabitants of a given universe, and time travel that divides history into various timestreams."
"Since the 1950s."
"Some alternate histories are considered a subgenre of literary fiction, science fiction, or historical fiction."
"To propose 'What if?' scenarios about crucial events in human history."
"Alternate history stories are conjecture based upon historical fact."
"Alternate history stories present outcomes very different from the historical record."
"Alternate history stories feature the tropes of time travel between histories and time travel that divides history into various timestreams."
"Time travel between histories divides history into various timestreams."
"The psychic awareness of the existence of an alternative universe by the inhabitants of a given universe."
"Alternate history stories propose the existence of alternative universes."
"Alternate history stories are based on conjecture and propose different outcomes than actual historical events."
"Alternate history stories present outcomes very different from the historical record."
"Alternate history stories feature the tropes of time travel between histories and time travel that divides history into various timestreams."
"Since the 1950s, as a subgenre of science fiction, alternative history stories feature the tropes of time travel between histories."
"Alternate history stories propose What if? scenarios about crucial events in human history, and present outcomes very different from the historical record."
"Some alternate histories are considered a subgenre of literary fiction, science fiction, or historical fiction."