How Do You Count Parallel Universes? You Can’t Just Go 1, 2, 3

Blog post from Scientific American about the "measure problem" of counting parallel universes:

Counting Parallel Universes

"The process produces a family tree of universes. The tree is a fractal: no matter how closely you zoom in, it looks the same. In fact, the tree is a dead ringer for one of the most famous fractals of all, the Cantor set."

Scientific American: The Case for Parallel Universes

The Case for Parallel Universes

 "Multiverse proponents Alexander Vilenkin and Max Tegmark offer counterpoints [to previous criticisms of multiverse theory], explaining why the multiverse would account for so many features of our universe—and how it might be tested."