In 2001 two of the leading cosmologists in the world published a paper suggesting an even more radical approach ... Our universe may not be the only one. (Big Bang & Cosmology & Parallel Universe & Multiverse) Morgan Freeman’s Through the Wormhole s1e4: What Happened Before the Beginning?
String Theory was developed in the last thirty-five years. ibid.
The incredibly strange world of eleven-dimensional space. ibid.
Out of string theory comes M theory. ibid.
Are there parallel universes? … They might determine the fate of humanity. Morgan Freeman’s Through the Wormhole s2e6: Are There Parallel Universes?
There’s another place to look for parallel worlds – not in the depths of outer space but in the micro-cosmos right under our noses. ibid.
Another universe. Another dimension. Perhaps occupying the same space at the same time. Star Trek s1e27: The Alternative Factor, Kirk to Spock
Not our universe, not our ship, something parallel. Parallel universe coexisting with ours on a parallel plane. Star Trek s2e4: Mirror Mirror
Hugh’s Everett’s discovery [Parallel Universes] was as big a breakthrough as those of Newton and Einstein. Professor Max Tegmark
A common feature of all four multiverse levels is that the simplest and arguably most elegant theory involves parallel universes by default. To deny the existence of those universes, one needs to complicate the theory by adding experimentally unsupported processes and ad hoc postulates: finite space, wave function collapse and ontological asymmetry. Our judgment therefore comes down to which we find more wasteful and inelegant: many worlds or many words. Perhaps we will gradually get used to the weird ways of our cosmos and find its strangeness to be part of its charm. Max Tegmark, article Scientific American 2003
I think these other parallel worlds are just as real as this one here. Which means that there also is another world where Germany won World War II. Professor Max Tegmark
When one studies the properties of atoms, one found that the reality is far stranger than anybody would have invented in the form of fiction. Atoms really do have the possibility of in some sense being in more than one place at one time. Professor Alan Guth, MIT
At every point of any one of these people walking by, you pick a point, at that point there would be an incredibly tiny curled-up either six or seven dimensions that you just don’t perceive. Professor Bert Ovrut, University of Pennsylvania