An alternate universe or parallel universe, as the name suggests, is another universe in a group of universes (ours included). The idea stems from certain physics theories, but is very far from either confirmation of falsification at this point.
Alternate Universes in Fiction
- In Star Trek, there exists an alternate universe in which Earth-based civilization, instead of developing into the Federation, produced the Terran Empire.
- In Stargate, several alternate universes exist, among them several in which Earth has been conquered by the Goa'uld.
- The TV series Sliders focuses upon a group of individuals with the capacity to travel from universe to universe.
Alternate Universes in the VS Debate
In versus debates, it is assumed that all fictional series/timelines are set in their own universes. Generally these two converge in some manner, usually involving wormholes or mass displacement of forces, nations, continents and star systems.