This "multiverse" idea is probably the most scientifically accepted explanation for the anthropic coincidences, but is by no means unanimous among scientists. I'll go through the pros and cons of each variety, in the next few weeks.
Max Tegmark also discusses four different levels of multiverse theories, but I'm only touching on the ones that would effect the coincidences that would allow us to exist.
I'll probably discuss string theory when I discuss quantum branching, as another example of a limited but large set of "universes" to choose from, and I'll probably discuss Max Tegmark's "Mathematical universe" when I discuss the last one, along with modal realism.
Yes, that first large panel is a homage to Jack Kirby's cover for Avengers #16.
NEXT: Beyond the Fields We Know...