(Q) said:
"Carrying this thought to a ridiculous extreme, what this means is that even if the universe consists of more or less empty space at a temperature of 10^-30 kelvin…
No. No such temperature is possible. This incongruity gives me reason to believe you aren't as well read on the subject as you'd like to be thought.
Why is a temperature of 10^-30 K impossible, Q?
(Q) said:
…random fluctuations will occasionally create atoms, molecules... and even solar systems and galaxies! The bigger the fluctuation, the more rarely it happens - but eternity is a long time. So eventually there will arise, sheerly by chance, a person just like you, with memories just like yours, reading a webpage just like this.
And, you don't understand the concept of entropy and 'heat death'.
(Q) said:
In short: maybe the universe has already ended!"
~~ John Baez
And maybe your grandmother has grown green gossamer wings and flown to the moon.
Q, you have to look at the theories and the 'agenda' behind them. And just for general reference, 'new and revolutionary (novel)' does not always presage 'meaningful'.
But let us leave cosmology and venture into theological speculation.
(Q) said:
It's interesting that an entity which had no beginning and no end would create a universe at this point and time in its existence, that is if theists truly believe a god exists, somewhere. One must wonder what he did before creating the universe?
Who knows? Does that substantially alter our presence in this universe? And you have it backward; God did not create a universe at this point and time in its existence; we are here at this point and time in God's creation.
(Q) said:
But if that god is the "fluctuation" that John refers, then it is a god that made many attempts to create the universe, starting small and working his way up.
Perhaps that's what he was doing all that time.
We're back to the gossamer wings.
Q, when you read 'new theory', watch for this formulation:
Chapter One starts, "What if – {insert pet goofy theory here}."
Chapter Two reads, "Well, if {ipgth}, then we can account for – gravity, magnetism, acne, quantum fluctuations."
Chapter Three says, "And if {ipgth}, then we can remove – world hunger, solar flares, graffiti, fat girls at dances."
Chapter Four says, "Thanks to {ipgth}, we are free from – bed wetting, ingrown toenails, bad humor."
And finally, Chapter Nth says, "Therefore, we can safe conclude {ipgth} is proper, useful, fully equipped and politically correct."
Usually, it's a bit more subtle, but the progression remains.