No - what you are discussing is that speculative and untested theories will change continually until one is found that outperforms the rest in experiment.
Established science is just that - established and proven beyond all reaonable doubt. That is where most science is, and no-one is changing their minds about that at all. Newtonian physics is still used and accepted, alongside Relativity and Quantum physics. String theory and some cosmological theories are still up for grabs, but that is not a marker for all science.
Multiple universes (in the cosmological sense) are not demonstrated to be true, and no physicist discusses tham as such. Kaku certainly only talks about them as a possibility, although experimental evidence strongly indicating their existence could be published inside the next few months.
In regards to THIS thread, the science changes all the time and has over the past 100 years. That was my point. It certainly has since I was in high school over 50 years ago. What I am saying is mankind still doesn't KNOW, but my God does. We don't need to know as Christians, because we trust in him to take care of his creation and do what we know and can do. We don't need to know because our destination is not on this earth in this universe so we're not too concerned about it.