What "other universes"? There is no clear evidence that such "other universes" even exist. If they do exist, it would likely make no sense to speak about how old they are NOW. Even within our own Universe, it doesn't make sense to speak about "simultaneity" between far-away points; this means that the word "now" is not clearly defined!
A group of universes is referred to as a multiverse. It is a hypothetical collection of multiple universes, including our own, that exist in parallel to each other.
Today, scientists no longer think in terms of a 'universe' as everything that exists. Our knowledge of the world we live in has progressed enormously as each new discovery reveals another fascinating truth. We used to think that Earth was at the center of everything that exists. We used to think that the stars in the night sky were somehow "stuck" on a celestial sphere. Even one hundred years ago, we thought that the Milky Way Galaxy was 'the universe'. Today, what we are accustomed to thinking of as 'the universe' composed of 100 billion galaxies racing away from each other at light speed may not be all of reality. Our universe may be one of many other universes in an even larger realm. This new totality is dubbed 'the multiverse'. Each universe in this multiverse may be likened to a 'brane' or 'bubble'. These separate universes are labeled by physicists and philosophers as 'parallel universes' or 'parallel worlds'. You can see how our knowledge of the world has progressed from 'other planets' to 'other stars' to 'other galaxies' and now to 'other universes'. And so far, the only other world we earthbound humans have personally visited is the Moon.
There is a lot of speculation, but no evidence, of the existence of other universes. They may or may not exist; we simply don't know for sure.
there is a theory that there are. the choice is up to you! Einstein said that Schwartzchild wormholes may be a gateway to alternate universes the math is quite complicated but on paper it is quite possible ------------------------------------------------------------------------------------------------------------ Theoretically, we do have parallel universes, and some [although not alot] of evidence supporting this theory has come up. Actually, even though the notion seems entirely ludicrous, there is some serious math behind the parallel universes theory or the many-worlds interpretation.
There are speculations about other universes, but for now, there is no way to prove that they exist. Or to disprove them, for that matter.It isn't clear what you mean by "negative universe" - what exactly would be "negative"?
It is thought that there are other universes that look like ours. It is also been suggested that there are an infinite number of universes.
There has been a lot of speculation about other universes, but it is just that: speculation. There is no firm evidence that other universes actually exist. Nor, for that matter, is there any firm evidence that other universes DON'T exist.
Parallel universes may, or may not, exist. While it is hypothesized that there may be other universes, there is no certainty that they do exist - nor, for that matter, is there any certainty that they DON'T exist. Since we don't know whether such "ohter universes" exist, we don't know what they look like either - although it has been speculated that other universes may have a different number of dimensions, or there may be other significant differences in physical laws, compared to our own universe. If this is the case, most such universes may be unsuitable for any sort of life.
'Multiverse' is an abstract noun because by definition it is purely hypothetical. It suggests the possibility of other universes and by definition we could never physically interact with other universes even if they exist. Other universes are not perceptible to our senses. They are physically disconnected from our universe.
That is unknown. Some hypotheses based largely in mathematics have suggested that this is possible, but there is no direct eveidence that other universes exist.
The existence of multiple universes is a theoretical concept in physics, such as the multiverse theory. Some formulations of this theory suggest the possibility of parallel universes or alternate realities, but currently, there is no empirical evidence to support the existence of other universes beyond our own. It remains a topic of ongoing scientific investigation and debate.
"Impossible."
According the the Multiverse Theory, our universe exists as a bubble among a plane of countless other universes, though that's not the limit to how many there are. This plane, which contains many universes, is just a bubble itself, floating in a sea of other bubbles. This sea is just a bubble, too, on a plane of other bubbles, each containing planes, seas, bubbles, planes, and bubbles. According the the Multiverse Theory, there are an infinite number of other universes.
That's related to the idea that there are other universes, other than the one we are in.
The term 'multiverse' is often used to describe multiple universes, or sometimes, 'meta-universe'. Owing to the paucity of proof of the existence of other or alternate universes the term is considered to have only hypothetical application at this time.
There are some theories which suggest the possibility of other universes. However, there is no definite proof of other universes, and as of know we know of only one, our Universe.
"multiverse" And its not really a theory as (so far) its untestable.