<p>Dark matter has been observed in galaxies, and the distributions of dark matter in galaxies have also been measured. It appears that the matter is firmly in our universe - we just can't detect it with electromagnetic radiation. However, there are ideas that dark matter <a href="https://www.quantamagazine.org/in-a-dark-dimension-physicists-search-for-missing-matter-20240201/" rel="nofollow noreferrer">is from a different spatial dimension</a>.</p>
<p>There are other theories related to the above. <a href="https://en.wikipedia.org/wiki/Brane_cosmology" rel="nofollow noreferrer">Brane cosmology</a> holds that we are trapped on a brane, a section of space-time with three spatial dimensions. However, there are one or more additional dimensions. All of these dimensions are known as the <em>bulk</em>. Gravity can &quot;leak off&quot; through these extra dimensions. Some theories take this to the extreme and say that there exist many universes (of a certain number of dimensions each, but with less dimensions that those of the bulk) that are branes, just like ours. These have been considered the source of phenomena such as dark energy -- in which case your scenario is within the realm of plausibility.</p>
<p>Again, this is in a rather speculative realm.</p>

CC BY-SA 4.0
2024-04-23T08:57:13.253Z
The limk 'https://en.wikipedia.org/wiki/Dark_matter#Mass_in_extra_dimensions' is empty.
Imyaf
CC BY-SA 4.0
2024-04-24T01:07:00.220Z
@Imyaf Thanks, you're right -- I've made an edit.
HDE 226868
CC BY-SA 4.0
2014-11-29T22:56:44.200Z
2024-04-24T01:12:18.037Z
2024-04-24T01:12:18.037Z
HDE 226868
<p>If there are many universes, they must have a gravity effect on each other. Since dark matter is measured through gravity, but we don't know the mass behind it, isn't it possible that it comes from another universe?</p>

CC BY-SA 3.0
2017-07-15T22:11:47.270Z
"If there are many universes, they must have a gravity effect on each other." Please give evidence for this assertion. The usual understanding of different universes is that things in other universes can have absolutely no effect on each other.
James K
<gravity><universe><dark-matter>
Can the theory of multiverse explain dark matter?
ruedi
# Can the theory of multiverse explain dark matter?

(Asked by: username_0 on 2014-11-29)

If there are many universes, they must have a gravity effect on each other. Since dark matter is measured through gravity, but we don't know the mass behind it, isn't it possible that it comes from another universe?

**Tags:** gravity, universe, dark-matter

> **Comments:**
> **username_1**: "If there are many universes, they must have a gravity effect on each other." Please give evidence for this assertion. The usual understanding of different universes is that things in other universes can have absolutely no effect on each other.  

---

## 1 answers

### Answer by username_2 on 2014-11-29. Score: 10 | Accepted answer

Dark matter has been observed in galaxies, and the distributions of dark matter in galaxies have also been measured. It appears that the matter is firmly in our universe - we just can't detect it with electromagnetic radiation. However, there are ideas that dark matter [is from a different spatial dimension](https://www.quantamagazine.org/in-a-dark-dimension-physicists-search-for-missing-matter-20240201/).

There are other theories related to the above. [Brane cosmology](https://en.wikipedia.org/wiki/Brane_cosmology) holds that we are trapped on a brane, a section of space-time with three spatial dimensions. However, there are one or more additional dimensions. All of these dimensions are known as the *bulk*. Gravity can "leak off" through these extra dimensions. Some theories take this to the extreme and say that there exist many universes (of a certain number of dimensions each, but with less dimensions that those of the bulk) that are branes, just like ours. These have been considered the source of phenomena such as dark energy -- in which case your scenario is within the realm of plausibility.

Again, this is in a rather speculative realm.

> **Comments:**
> **username_3**: The limk 'https://en.wikipedia.org/wiki/Dark_matter#Mass_in_extra_dimensions' is empty.  
> **username_2**: @username_3 Thanks, you're right -- I've made an edit.  

---

