Alternate universe

An Alternate Universe, also known as a Parallel Univers, as the name sugjests is another universe in a group of universes (ours included) known as the Multiverse. The idea stems from certain Physics theories, but is very far from either confirmation of falsification at this point.

Alternate Universes in Fiction

As they allow asking of "What if?" Questions, Alternate Universes are common themes in the genres of Science Fiction and Alternate History

• In Star Trek, there exists an Alternate Universe in which Earth based civilization, instead of evolving into the Federation, evolved into 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 copacity to travel from universe to universe

Alternate Universes in the vs Debate

In verses debates, it is assumed that all fictional series/timelines are set in their own universe's. Generally these two converge in some manner, usually involving wormholes or mass displacement of Forces, nations, continents and Star systems.