I will go with what scienists predict, and that was like what 5 biljon years? I can't remember.

likely shape of the universe? makes it unlikely?
plz. explain.

Let's use gum for an analogy.

First take the gum and roll it out flat. It's not going to collapse back in, it's just going to keep spreading out thinner and thinner.

Now try blowing a bubble with the gum. This would be like a spherical universe. Unlike flattening the gum out the bubble eventually will reach a critical point, deflate and collapsing back in on itself. (your cycle)

The third possibility is we flatten the gum out but curve it. So it flattens more in some spots than others. This would result in those thinning areas to become to thin and create wholes, or rip apart.

This would apply to the universe as well. If everything is thinning out the matter can't interact resulting in everything eventually settling and cooling. If everything is expanding in a bubble it will eventually reach critical point where it collapses back on itself. if it's curved there will be an unequal expansion resulting in the universe ripping apart.

Now there is more to consider than that which we don't have all worked out, but from our observations of the universe compared to models of a flat, curves and spherical one it matches a flat universe the best. So we can expect everything to evenly thin out and the matter inside to settle and cool due to lack of interaction.

Now try blowing a bubble with the gum. This would be like a spherical universe. Unlike flattening the gum out the bubble eventually will reach a critical point, deflate and collapsing back in on itself. (your cycle)

not exactly.

my theory was that inside the bubble there is something sucking the gum in. (black holes) until it has sucked up all the gum. and then blows a bubble by itself.

from our observations of the universe compared to models of a flat, curves and spherical one it matches a flat universe the best. So we can expect everything to evenly thin out and the matter inside to settle and cool due to lack of interaction.

and i think there will always be interaction because the black holes will keep going. even when it will be cooled down there will be hot spots whit a working hole.  pulling all the matter to 1 dens point and implode.

But there is only so much matter in the universe (ignoring antimatter since it's not yet quite understood). Your idea about the cycles due to black holes would only work if matter was ubiquitary and more or less evenly spread, which would not work over time if the universe had finite borders.

Your idea about the cycles due to black holes would only work if matter was ubiquitary and more or less evenly spread,

dunno. science doesn't nearly know anything about black holes. (thats why it's just a theory)
but sofar it seems they suck in just anything. matter, antimatter, energy, emptyness. its hard to explain my view on something that is so little known of.
but if it just keeps going then eventually after a few centillion year i think that it could have attracted everything.

if there is nothing around it. it pulls stuff from further away.

that last sentence was supposed to be deleted.
that is ofcourse not true in this theory. the further away will come closer as the hole sucks in everything in between.

One black hole cannot attract everything, for there are multiple of them, and at greater distance interactions with other particles become more important than the attraction. There are some people who indeed think that blackholes will eventually have sucked up most, er, things. But we don't know if they keep sucking forever.

Btw, I'm not nearly as knowledgeable as I would have to be to assert all this with certitude, I'm just giving my two cents about this. Your opinion is as good as mine I guess.

One black hole cannot attract everything, for there are multiple of them,

yes, when they meet they fuse. that has been observed once 6/7 year ago or so.

I'm just giving my two cents about this. Your opinion is as good as mine I guess.

i do the same. i got nothing as backup except for my own thoughts and the bit i readed about it a while ago.

but why make it harder then it is? to sound more interesting?

Bah, you make it sound bad when you say "to sound more interesting". I see nothing wrong with this. Interesting is usually always nice, what type of world would we live in if there was nothing interesting in it.

Oh and P.S. just saying "we dunno" is considered spam.

if you just come to the point you don't have to care that people wont understand.

I prefer people to understand and agree with me (however unlikely and few times that happens).

anyway i got my own theory of cycles as i explained a few times already.
so the univers simple has always existed. there is no such thing as "befor the universe / creation".

If it isn't to much to ask for, what exactly do you believe in. God? The Big Bang Theory? Anything else? Or just that the universe has always existed with no proof or validity to that statement? Do you know of a website that agrees with this and can explain it better as to why the universe has always existed then just saying "it always has" with no statements backing that up?

I ask out of plain curiousity.

If it isn't to much to ask for, what exactly do you believe in. God? The Big Bang Theory? Anything else? Or just that the universe has always existed with no proof or validity to that statement?

god - definitely not

big bang theory - science is mostly pointing at this.  therefor i have to take itas a serious possibility. and therefor inserted it in my own theory.
after the last black hole has sucked in everything left. it will start to "eat" from itself. until it implodes and BIG BANG the cycle starts again.
(see it more as a expension on the big bang theory.)

universe has always existed - yes and no. - yes it has always existed. - no not this universe alone. there have been others befor and there will be others after this one.

there is no solid proof for the big bang and especially not for god.
so yea like everyone i believe it whitout solid proof.

Do you know of a website that agrees with this

not whit this specific idea. it came from my own mind. but i bet there are others who hold the same believe that it always has existed. i just dunno if they got the same theory.