Universe has always been around. There is no start or end.

The beauty of science is that it discovers, theorises, tries, concludes, and if mistaken, learns and corrects. It's fascinating and beautiful that there are so many things we still don't know about the universe. There is so much for us left to discover, to learn, to comprehend, to know.

I appreciate the guys that are willing to make their guesses more confidently than anyone else

The observable universe is probably less than 0.1% of the real scale

My head hurts.

A song said it best. Nothing from nothing leaves nothing.

In a million years you won't think that it'll be very different

Because we feel alone in the universe it’s the reason we talk about this. If we know we are not alone and we had communicate with aliens then it’s not interesting anymore.

Geeezzzz I don't have a college education, I'm not a scientist, not religious, and I've questioned the BB and said this same thing for decades. When I asked a lot of questions and pointed out what didn't make sense to me about the BB theory to a UCSD microbiology professor friend, he got irritated and said, "You ask too many questions".

No one knows…. That’s the magic of it . Cox ‘s humbleness , ‘ I don’t know’!

If the big bang did happen just in small area where we are leaving but not in the whole univers but our scientists are taking what happened in our area and using it for the whole universe!!!!!!!

It’s amazing what Brian Cox and Dr. Carl Zucker discovered together recently while writing a paper on the expanding universe. They seem pretty excited about it. It’s called the “Cox-Zucker”principal of expansion 😬

If something is never ending, why would you think you see the end.

Time is real, so says my boss

Remember Prot from kpax said the universe goes thru cycles of expansion and contraction where everything time and space related repeat exactly as before !! So he was saying you get only once chance that get it right

If the Earth is 4 1/2 billion years old I bet the universe is trillions of years old and there are probably billions of universes in the infinite space that is not expanding but is already infinite.

Definitely on the right track now. Stop looking at the tree When there is a forest.

I think it was Hubble's mother who asked "What Banged?". Since then, it seemed to me that what we were saying is "we're not going to go there", surely because we did not know. Now we know a little more - but let us not ever pretend that we know. We know what we know and when we know some more, we will know that.

where is the matter from? how it was made?

I believe your right Mr Penrose.

Time may not have a beginning and an end. The concept of beginning and end is a man made concept of our mind we try to fit everything into

Roger Penrose's CCC seems more natural than inflation.

BB probably a local event in an infinite universe

It still is passionate something that maybe never have answers. Mystery is part of this pulsar. This life

It is simply like a circle peppered with singularities. The circle we have long understood. The singularities we will never understand!

In the beginning...........there wasn't one.

You would believe even though the universe is smaller than we think it's still very large.

Which one of the big bangs are we talking about? and How many universes exist, just like there are many galaxies , there are many more solar systems. and I bet bangs are happening more often then we think, I have always thought it very unlikely there was only one big bang.

If quarks can appear spontaneously, why can universes not? Is it not just the scale of the event that is so unimaginatively different. The notion of cyclical growth and decay is right in front of us, galaxies, black holes and the whole gamut?

The Dalai Lana was in conversation with a cosmologist. He said to the cosmologist ‘okay, big bang. But before that, other big bangs, other universes’. Maybe western cosmology is catching up with Buddhist understanding of the cosmos(es).

Tom Gold was right back in the 50's

So we don’t know 😄

The universe has always existed because space is the universe and has always been, it is a constant that does not shrink or grow. Matter within space also contains space which creates a vibration between matter and space that is gravity and creates the observable universe. Space and all the matter within it is like a galaxy circling a black hole and falling towards it until matter within the black hole becomes equal to the gravity of space and with the help of centrifugal force starts to expand into our flat observable universe.

Nah, first there was nothing, and now the heavens were sewed together and split apart into galaxies, There was nothing and then there were everything .

What a shocker 🙄 😂

On d verge of a dyeing universe there r many black holes that coaalce while some get left behind of two or three dyeing universe may coaalse which might determine how big d new universe will be with what properties n with remenent black holes within this space...

How do we know that a Galaxie's red shift indicates its movement away from us rather than simply the light's wavelenght increasing due to it travelling over various vast fixed distances. Also, how do we know that the microwave background radiation is residual radiation from the big bang and not the combined radiation from all the stars and galaxies in the visible universe?

Steady State Universe, or...the Universe *actually* grows coincidentally every time we make a stronger telescope? Hmmm...I know! Send more funding!! 🤣🤣

There are endless universes. With endless exponentiation.

I don’t believe every combination that is possibly exist that’s dumb

Why is this so hard to understand? --> Why is the Universe so perfect for life? Because if it wasn't we wouldn't be here. -> Why is the Earth so perfect for human evolution? Because if it wasn't we wouldn't be here. --> Why haven't we found intelligent life outside Earth? Because it's shy. --> How many alternate Universes are in the Multiverse? 37. --> Why 37? Because that's all there are. Prove me wrong.

And why has everything have to begin somewhere.

If one sees an object which it dose not exist at this time is it actually in the past or dose time actually matter.

If one believes in a mechanistic view, there is a set mix of energy and mater and the BB is merely one shift in the ratio of E to M and there cannot be such an origin since E/M shift over time but E+M=1 If a creationist, E/M is not random since E+M is the act of G-d. Either way, time +Distance=make your choice Boom or G-d!

Brian explained like he witnessed the universe birth and grow, that's so funny, because Big Bang or not, it is just a theory, who know? and the synonym of theory is guess, so I give my guess too, it's infinite where exist and inexist are coexist.

A harmonically balanced self-Regenerative oscillating wave form.

Very controversial. As to Hawking radiation from BHs, it's thermal and contains zero information about what fell into the hole. The cyclic universe is an old idea, as people have problems with the initial singularity. But that cannot be avoided. And the current expansion will hardly reverse itself and become a the Big Crunch. The multiverse is ruled out by Occam's razor. Quantum theory is not well understood, in particular in a situation where the gravitational field is not a static background. It is possible that spacetime is an emergent property of a very simple system with zero entropy.

@ brian cox. If all the gass in the sun was converted to an iron core, how much smaller would it be?

our "universe", is an old science project abandoned in the backpack of an Alien's 5th Grader..for his summer break. ..and You can't prove me wrong.

It is possible or as possible as any other guess. But even the CC concept still misses a key point. How did these galaxies get here so soon. Just stretch the theory further that yes all the matter and energy was consumed by black holes as the prior universe collapsed. But when most of those black holes merged or radiated and then exploded into the new universe there could be one or two black holes with the last matter or saw galaxies not yet sucked into the hole. When the near by massive black hole exploded it sucked in the other black holes and the nearby final few galaxies , like through a hole and them emerge in the new universe. One would think the galaxies would be a bit in pieces or stretched if true. As good a thought as any. Cheers

Why is there no consequences for being wrong ? Moving forward we need high levels of validly , and security behind such claims .

Let’s say 2 zero dimensional points were separated by time, yet still both existed simultaneously. If 1 second was like 1 second to one of those zero dimensional points, but 1 week was like 1 second to the other, it would make sense why the two are separated by time yet still exist simultaneously. If 100 years went by while we never had a sense of being, that 100 years to us would seem like a flash because we wouldn’t have any memory of not having a sense of being. Let’s say we never had a sense of being forever. Would that infinitely long period of time be like a flash to us. Well if an infinitely long period of time existed it would be impossible to measure a finite period of time against it. I think the only way our sense of being can not exist, is if instead of 1 second feeling like one second, and 1 hour or 1 month felt like a second, our sense of being would not exist to someone who 1 second was like 1 second to. So if 1 week felt like 1 second to us, but 1 second felt like 1 second to the person standing next to us, according to that person standing next to us our sense of being does not exist. So if 1 week is like 1 second to us, would that mathematically be the same as our sense of being not existing for ever, ever and ever. To us, a hurricane, wave, or falling line of dominos doesn’t have a sense of being, but from what has been discussed is that really true.

Such a wierd dream.

a paradox...where did the energy come from to create the big expansion....the praying class has simplistic answers ..as if they would know...amen

None us know what's the real truth But it is before and after humans

Buda was really alien? he was know even recent discovry😮

The BB theory was just that. A THEORY! It’s never been proven as fact and I for one never bought it anyway.

There was nothing before the big bang. the universe arose from practically nothing. In accordance with the inflationary model, in the initial stage of its evolution the Universe experienced a period of accelerated expansion - inflation. It is assumed that at this point the Universe was “empty and cold” (only a high-energy scalar field existed) and then filled with hot matter that continued to expand.

People should just stop using the words Big Bang. Just say we dont know what when why how or if and leave it that way.

Annoying. When I’ve looked up this answer before I always ran into videos explaining “how dumb the question is because it was nothing”. But now science alots for even crazier ideas

Unless one implies a God. There must of been something weather games that mutated and evolved to become what happened next. Billions of years it took to be where humans are.

Don't apologize to us... apologize to God.

Of course you don’t know but God knows

😂😂😂😂pure speculation. No one knows how or when. It's all a mystery...

Spacetime is a four dimensional entity. If we have space, then we have time, and vice versa: if we have time, then we must have space. The notion that time did not exist before the big bang is not logical. Time is timeless; there is no arbitrary zero point of time. We can obviously rewind to a billion years before the big bang in time. If we can extend time to before the big bang, then space must also have existed before the big bang, because where we have time, we also have space.

Why " we are sorry " ? Unnecessary drama, it sounds stupid

There is not one Scientist that has a clue on how the Universe came to be. All theories. No one knows.

Im a 52 year old athiest leaning towards agnostic I see some comments about it wasnt God come on if your a athiest you should really rethink this i was a hardcore athiest though my teens to early 50s maybe there was something probably not what ideal of a religious person concept of a supreme entity but we also discovered 2 trillion galaxies in the observable universe that what changing me be open to a God every time i see new discovers i just dont know 😊

This isnt the same video i commented to its been changed so to say my comment was to confirm that religion and the belief of god still holds more reality than any scientific speculation witch history has proven so far that what they say is in the past has been proven to be wrong so to belive in witch religion or science of our creation and how it started was proven that the big bang theory was just a science belief witch has as much credibility as the a religious belief but im choseing god first

Yeah no shit

Can’t get something from nothing

So, I would just say God created the Big Bang?

These videos are basically to educate religious people. God is the universe and vice versa. Except conversations about reality cannot be held if all the person rants about is god this god that enough with that god crap already there is more to understand than that and you are shallow headed if the word god is all you use to define every aspect of existence. Sure god did it, farts smell, sound is loud and light is bright there are mechanics behind the forces of nature and a god used to describe them gets humanity no where.

Anything no matter how irrational or unsubstantiated would be accepted…except for God. The real mystery is not the Universe, the real mystery is there rejection of God. Any evidence for God would be twisted as proving ‘no need for God’.

Make it up as they go along

Its wild how much they pump out new innovations in the subject matter and still don't realize it points to the Light of World - Yeshua

wow I been first to post a bunch lately, very rare ... cool ..hello from Idaho, now b4 you go hating on Idaho ..its actually a beautiful mountainous state.

The fool thinks there is no God but he inherited his mind from nothing!

Ive said it before and ill say it again..this Universe was spawned from a previous Universe and i can explain to you how..its not turtles all the way down..its previous Universes..Penrose is close but not quite there yet..

U-turn! I have been saying this for years. There is no beginning, and there is no end. Science tells us that this is the most likely theory to be proven to be correct at some time in the future. We do not live in a goldfish bowl.

I could have told you so, the universe has no beginning nor end it has always been like God has always been , the Alfa and Omega!

Yes and they make series about it now, but a cute theory, but false. Just chill, multiple universes lol. Just map our universe ok? Then start talk about other universes. We have only discovered 8% of the seas , not even the debt of the seas are mapped except with a suspicious Ecco

There was not and naver a big bang. The universe is eternal.

it is so arrogant how specific these guys are with their number's and details. none of this is fact. none of it. just stop!

Thank you . Does nothing exist? YES NOTHING DOES EXIST. ETERNITY also exists , the answers are not ours to examine, we as human beings do not have the ability to comprehend, nothing ,or eternity . All we know is that you have to have nothing for something to be ,and that eternity is the easiest translation to understand. ETERNITY means that something has always been here Death would be the closest thing to nothing that our minds will let us understand. Our eternity was taken away from us ,we were able to disappear, go other places at one point , before our time as human beings began ,our solar system is never-ending this is where human dreams take place ,this is all we get for now

They know nothing about the universe at all

There was no big bang! People don't take time no more to reflect on the things around us , if we were missing things in life that made life hard then it would be a thought, but the earth has every single thing a person needs to live , the earth was made for man and man was made for the earth, wether you've ever thought about it or not the things around us show us these things were made from someone with a personality, beauty , laughter, funny, joy ect.... If you could make stuff with an explosion 💥 I'd be first to do it!!!!!!!!!!

Given Tyson's strident atheistic pronouncements and his obvious partisan Trump derangement, I recommend not quoting him on anything scientific since his strong biases would tend to make neutrality in any field very unlikely.

Or... Scientists are wrong. Again

Brian Cox, simple.. always was and is wrong. period.

Ah yes, sweaty british intelligence. He looks greasy.

This guy is a lier he said you can't creat a tree from a single leaf cause yes you can it's called cloneing this guy is a lier just a flat out lier don't believe a single thing he says

I’m with Mr Penrose on this one

This whole reason of scientific speculation is that they just don't want it to be God but I'm going to say this is proof that God still holds the truth