Type: Alternate Earths
Usual Means of Access: Presumably through vibrational
Dominant Lifeform: Human
Prominent Inhabitants: Various doppelgangers of Marvel-Earth
Comments: Various alternate Earths where events
diverged at critical points in history have been glimpsed.
So far about fifty of these such Earths have been observed,
although theoretically they are limitless in number. The
only world that has been visited by denizens of the "mainstream"
Earth is an alternate Earth where Reed Richards became the
First Appearance: WHAT IF #1