Our universe is dominated by a mysterious matter known as dark matter. Its name comes from the fact that dark matter does not absorb, reflect or emit electromagnetic radiation, making it difficult to detect.
![](https://scx1.b-cdn.net/csz/news/tmb/2021/thesmallestg.jpg)
Source:
https://phys.org/news/2021-02-smallest-galaxies-universe-dark.html