Do the fundamental laws of physics change over time?

Question

//Like does gravity and elecro magnetism... the way we calculate these change in "extreme" //circumstances. Like a lot of the basic laws of physics and how are universe functions require electro //static background radiation from the creation of the universe which has shown to have some... //"waves" in it. So if the basic fabric of space has waves in it and could potential not exist ... before //the big bang... then are these forces not actually things that are constants or are always their but //instead are created things? because space is expanding (space by my definition being 3 //dementional location occupied by elecro static background radiation) then shouldent this mean the //"fundemental laws of nature" don't apply outside of "space". like the bigbang makes particles come //into and out of existence all the time all around us to make existence exist.... so if their was another //big bang would the laws change would the back ground radiation be different or the same? I just //want some opinions based on up to date knollege which mine is obvioulsy not.

//EDIT//

Do the fundamental FORCES (not laws) (http://hyperphysics.phy-astr.gsu.edu/hbase/forces/funfor.html) that govern our universe EVER CHANGE under any circumstances? This research (http://www.scientificamerican.com/article/gravity-waves-cmb-b-mode-polarization) seems to suggest the DENSITY of the universe changes! What does the universe's density mean exactly? Does it mean more localized CMB in a spaller space? or Does it mean a higher quantity of particles created by CMB? If this research is correct then it would prove that even the fundamental forces of physics are temporary. 

Comments

Voting to close; doesn't seem to make any sense to me. I'll retract my close vote if you refine your post and make it more up to the standard of PhysicsOverflow.

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Dear 500+ rep users, it would be great if you could not only upvote my above comment and downvote the question, but also upvote the linked close vote (which can be seen only by 500+ rep users).