When the Black Holes swallow up all of the universes, then what?

I guess it will be all over.

Regurgitation?

They evaporate. Look up “Hawking Radiation”.

They won’t. Black holes, like everything else in existence, have a limited lifespan.

Everything will be in darkness unless another “Big Bang” takes place.

It’s important to factor in that a large part of the science community believes the universe is both expanding and accelerating.

I thought that further study showed that the movement they thought was expansion, is actually shringing. Did I get that backwards?

They will not. Black holes are born from the death of giant stars, and their gravitational pull does not suddenly increase.
Objects that were not affected before a BH’s birth, will not be affacted after.
For example, if Earth’s sun turned into a black hole (which it will not, because it is too small) without the nasty supernova, Earth’s orbit around the sun would not change.

From “Annie Hall”:

Doctor in Brooklyn: Why are you depressed, Alvy?

Alvy’s Mom: Tell Dr. Flicker.

[Alvy sits, his head down – his mother answers for him]

Alvy’s Mom: It’s something he read.

Doctor: Something he read, huh?

Alvy: [his head still down] The universe is expanding.

Doctor: The universe is expanding?

Alvy: Well, the universe is everything, and if it’s expanding, someday it will break apart and that would be the end of everything!

Alvy’s Mom: What is that your business?

[she turns back to the doctor]

Alvy’s Mom: He stopped doing his homework!

Alvy: What’s the point?

Alvy’s Mom: What has the universe got to do with it? You’re here in Brooklyn! Brooklyn is not expanding!

Doctor: It won’t be expanding for billions of years yet, Alvy. And we’ve gotta try to enjoy ourselves while we’re here!

The current scientific understanding is that the entire universe, black holes and all, will eventually fade into nothingness. If this is going to keep you up at night, you can take consolation from the multiverse hypothesis, which conjectures that there is an infinite sequence of big bangs and universe fadings.

I was thinking of the movie scene in @Pachy ‘s answer when I saw these excerpts from a debate between atheist philosopher Shelly Kagan and William Lane Craig, who has made something of a career of debating atheists. Check out the second video. Craig ends up sounding just like Alvy, showing that these things do not just happen in movies.

Thanks for sharing that info, @LostInParadise. Woody Allen has touched on this theme often in his films and New Yorker writings. I’m willing to bet that he’s familiar with Kagan and Craig’s debates.

My understanding, recognizing that my knowledge base is very limited, is that the size black holes can achieve is limited by the amount of mass within their gravitational grasp. Once this matter has been consumed, the black hole will evaporate. While two or more black holes can merge, the black hole that results cannot be maintained without material within its greater gravitational field. As vast as the cosmos appears to be, no black hole will ever be able to become large enough to swallow it.

Regarding the possibility of multiple universes, it is not likely that all of them will contain black holes or that all will follow the laws of physics that exists within our universe.

@Here2_4 Yes according to evidence galaxies are all floating away from each other at even accelerating rate, outwards, and not closer

@Darth_Algar They won’t. Black holes, like everything else in existence, have a limited lifespan.
In laymen’s terms, what would cause it to just evaporate? If it is continuously pulling in matter but not surviving, it would be like a fire being constantly fed with gas to just go out without cause because the gas, without changing characteristics, no longer provided combustion.

From my understanding, blackholes don’t move fast at all (from our perspective of time). In fact, if you fell into a black hole, by the time your feet reached it you would be able to look up at the solar system you fell from and the solar system will have already gone through its life cycle.

So if we were going to die from a blackhole, it would have already been sucking us up for a million earth years or so.

Everything shoots out the other end of the black hole and starts over as a new universe.

@gondwanalon Everything shoots out the other end of the black hole and starts over as a new universe.
Is there a Hubble I can see of this new spat out universe, or is it a scientific unicorn?

@Hypocrisy_Central

For one thing black holes don’t continuously pull in matter. They pull in matter that crosses their event horizon. However this is rare. Essentially they don’t consume anything that was not within their gravitational pull to begin with. Like Loli said, if our Sun was to become a black hole (unlikely, as it’s not massive enough, but let’s say that it did anyway) then the Earth’s orbit would not be affected at all. Nor would the orbits of any other planet, not even Mercury. Maybe, on occasion, something will fly close enough to it to cross that gravitational threshold, but this would be quite rare and no more expands the size or pull of the black hole than the Earth’s size or gravitational pull is effected by a meteorite striking its surface.

@Darth_Algar Like Loli said, if our Sun was to become a black hole (unlikely, as it’s not massive enough, but let’s say that it did anyway) then the Earth’s orbit would not be affected at all.
Then one can figure the reverse as well, if the Sun increased in size, even if not much, the orbit of the Earth and other planets would not be affected, correct? And if so, why not, why would it not apply the same?

@Bill1939 Once this matter has been consumed, the black hole will evaporate.
When a black hole maxes out on material intake, where does all that matter go when the black hole evaporates? How does anyone know this if the phenomenon has never been witnessed?

Self edit: Nevermind

@Hypocrisy_Central my understanding is that the matter captured by a black hole is converted into energy. The presence of black holes hidden within galaxies has been determined to exist by measuring the eccentric orbits of stars over a number of years about a common gravitational center. The vast distances between galaxies make the observation of black holes difficult. The mathematical analysis of astronomical data, including observations made decades ago, provides the basis for developing theories that are largely held in agreement by these scientists. Black holes without galaxies to point to them cannot be observed with current astronomical methods.