Type: Alien world
Environment: Essentially Earthlike
Usual Means Of Access: Vibrational attunement
Dominant Lifeform. Humanoid
Prominent Inhabitants: Mercurio

Comments: The "Fourth Dimension" is a world that somehow became reversed in polarity - stars turned black and the sky a brilliant white - and began to die. In desperation, the people of that world sent an emissary to Earth to steal our planet's magnetic field in the hope that this would stabilize their existence, but that plan was foiled by Thor.

First Appearance: THOR #208