"The universe has always existed."

[shawn001]

Or multiple universes.

Maybe in another universe its effect and cause, because there is nothing to say time can't flow backwards in physics.

There is the "arrow" of time in this universe. Time and space are intertwined.

Space without time would be frozen.

Time without space? How does that work?

There is also no reason another bang couldn't occur inside this universe tomorrow.

Speed of Universe's Expansion Measured Better Than Ever

"The most precise measurement ever made of the speed of the universe's expansion is in, thanks to NASA's Spitzer Space Telescope, and it's a doozy. Space itself is pulling apart at the seams, expanding at a rate of 74.3 plus or minus 2.1 kilometers (46.2 plus or minus 1.3 miles) per second per megaparsec (a megaparsec is roughly 3 million light-years).

If those numbers are a little too much to contemplate, rest assured that's really, really fast. And it's getting faster all the time."

Speed of Universe's Expansion Measured Better Than Ever - Scientific American

 

[Sleeppy]

Time never 'began'; it is not linear. It began, only in relative terms. Time is illusory. It is one, not 3 (past, present, future), as the Jews and Muslims state. Also, the singularity consisted of infinite energy. The conservation of energy law is telling you that there is a 'living' God. But if you're atheist, for example, you may replace 'God' with Reality/Universe/Multiverse.

 

[shawn001]

Time and space did not exist inside the singularity


"The conservation of energy law is telling you that there is a 'living' God."

What? Please do explain?

 

[Sleeppy]

Time and space did not exist inside the singularity

Can you explain this statement?

 

[shawn001]

Can you explain this statement?

Before I do, lets make sure something is straight here. The singularity is not part of the actual big bang theory.

An analogy might be be abiogenesis and evolution.

The BB theory is just that the universe was very hot and very dense in the past. 13.7 billion years in the past.

Go down past Planck time epoch and see what happens when you do the math?

In this change the word exploded though, to expansion.

"Before a time classified as a Planck time, 10-43 seconds, all of the four fundamental forces are presumed to have been unified into one force. All matter, energy, space and time are presumed to have exploded outward from the original singularity. Nothing is known of this period."

Big Bang models back to Planck time


The Big Bang: What Really Happened at Our Universe's Birth?

So the very beginning of the universe remains pretty murky. Scientists think they can pick the story up at about 10 to the minus 36 seconds — one trillionth of a trillionth of a trillionth of a second — after the Big Bang.


"At a singularity, space and time cease to exist as we know them. The laws of physics as we know them break down at a singularity, so it's not really possible to envision something with infinite density and zero volume."

So, after the bang we know time and space as we know them today, inside a singularity time and space cease to exist as we know them by the laws of physics.

 

[shawn001]

Time and space did not exist inside the singularity


"The conservation of energy law is telling you that there is a 'living' God."

What? Please do explain?

"The conservation of energy law is telling you that there is a 'living' God."

The first law of thermodynamics is a version of the law of conservation of energy, adapted for thermodynamic systems. We don't know yet if we are in a closed or open system.

The Second Law of thermodynamics


"In the 18th century, geologists started to gather evidence that maybe the Earth hadn’t been around forever.

Perhaps it was only millions or billions of years old. Maybe the Sun too, or even… the Universe. Maybe there was a time when there was nothing? Then, suddenly, pop… Universe.

It’s the science of thermodynamics that gave us our first insight. Over vast lengths of time, everything moves towards entropy, or maximum disorder. Just like a hot coffee cools down, all temperatures want to average out. And if the Universe was infinite in age, everything should be the same temperature. There should be no stars, planets, or us.

"Which means that if you run the clock backwards, and it was smaller in the distant past. And if you go back far enough, there’s a moment in time when the Universe began. Which means it has an age. The next challenge… figuring out the Universe’s birthdate.

How Old is the Universe?


Of course current observations are looking like if things don't change, we are headed for maximum entropy. "The Big Freeze."

 

[Sleeppy]

The BB theory is just that the universe was very hot and very dense in the past. 13.7 billion years in the past.

"Before a time classified as a Planck time, 10-43 seconds, all of the four fundamental forces are presumed to have been unified into one force. All matter, energy, space and time are presumed to have exploded outward from the original singularity. Nothing is known of this period."

Big Bang models back to Planck time

"At a singularity, space and time cease to exist as we know them. The laws of physics as we know them break down at a singularity, so it's not really possible to envision something with infinite density and zero volume."

Not sure what to tell you.