Didn't study physics so I don't understand the connection from state of energy to entropy." Again sounds like sSheldon of The Big Bang Theory TV series doing his math on a white board.
"To "go back in time" would mean to be able to create energy from chaos, to unburn the steak, unpop a balloon, and unring a bell. It's ludicrous to even contemplate. Let alone all this hokum about multiple universes ...
First, I've always heard that mass and energy can not be created nor destroyed. It will take different forms, but always exist. Another flawed science principle?
Secondly, I've already stipulated my belief that time is a human construct. Yes, the Big Bang theory uses reverse the doppler shift to go back far enough to some 14 billion years to the Singularity. Where's the proof that time is nothing other than a start and a real force?
Lastly, where is any PROOF of multiple universes other than on their white boards? Yes, I know that's where "dark matter" advocates try to prove such and claim their is some over 98% of matter missing in our known universe. Okay. Where are those atoms? Mass can now definitely be detected. Are their calculations wrong? Interesting that "string theory" hit a dead end. Theories often do in the light of day.
My biggest problem with the big brain physicists is even their best minds can't figure out the Singularity. I don't think they ever will. I believe what's behind the Universe is actually beyond our human comprehension. That goes back to a divine or other entity.
Oops, meant the "red shift", which I understand is a proven scientific measurement for mass moving away from our known position. Can't even keep straight the few physics I think I know. Can't even remember my Junior High algebra. Better go before I look even more stupid...haha.