Antimatter Universe

The Antimatter Universe is a location in Ben 10: Omnitrix Unlimited.

Description
As its name suggests, the antimatter universe is made of antimatter. While similar to other universes, several physical laws and properties are altered significantly. For example, oxygen is a lethal gas, but you can breathe in the space vaccuum. The Sun absorbs light, while some planets emit 'planetary' radiation. Strangely, the Antimatter Universe has more population than a normal universe. Of course, there is a Ben Tennyson in this universe as well, who is vastly different from our own.

Ben 10: Omnitrix Unlimited

 * Lights Out (first appearance)

Trivia

 * According to Paradox, there are an infinite number of antimatter universes, each one tied to its respective 'matter universe'.
 * Some Ectorunites live in the antimatter universe.
 * Beings from the matter universe cannot enter the antimatter universe and vice versa, except for special occassions.