Type: Alternate Earths
Environment: Earthlike
Usual Means of Access: Presumably through vibrational attunement
Dominant Lifeform: Human
Prominent Inhabitants: Various doppelgangers of Marvel-Earth denizens

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 Thing.

First Appearance: WHAT IF #1