This article has some thing that I didnt know before, and I have a pretty high interest in the area. The 10^500 possible universes in string theory can be narr

This article has some thing that I didnt know before, and I have a pretty high interest in the area. The 10^500 possible universes in string theory can be narrowed to those that allow eternal inflation and a baby universes can tunnel around in the multiverse landscape until it comes to a place that allows eternal inflation. The tunneling causes gravity waves, polarizing the photons of the cosmic microwave background. There are other tests too.