The mystery of the formation of the first galaxies in the universe is a puzzle for researchers. The nature of dark matter is also one of the most important mysteries faced by fundamental physicists. However, understanding the nature of dark matter—for example, whether it is cold or warm—and its subsequent effect on the formation of the first galaxies is a huge challenge.
Click here for original story, The 21-cm forest probe may unlock secrets of early universe, nature of dark matter
Source: Phys.org