The Vampire Dimension is a parallel universe characterized by a post-apocalyptic earth inhabited by "Vampires". How and why it reached its present condition is unknown, but Atomic Robo speculates that it was similar to our world until some kind of worldwide catastrophe struck in the early 1900's, which caused the human population to transform into vampires. It was first discovered by Nikola Tesla and Atomic Robo in 1927 when they accidentally invented an inter-dimensional gateway while trying to build an electron microscope. After two vampires came through the portal into Tesla's lab, resulting in the outbreak of violence, the portal was disassembled and Tesla never spoke of it again. However, in the 1990's the U.S. Army used their own portal, (Atomic Robo currently believes the FBI stole