Dark matter, which researchers believe make up about 80% of the universe’s mass, is one of the most elusive mysteries in modern physics. What exactly it is and how it came to be is a mystery, but a new Johns Hopkins University study now suggests that dark matter may have existed before the Big Bang.
![](https://3c1703fe8d.site.internapcdn.net/newman/csz/news/tmb/2018/darkmatter.jpg)
Source:
https://phys.org/news/2019-08-dark-older-big.html