However, scientists don’t see enough visible mass in many galaxies in the universe, yet gravity keeps such galaxies intact. How’s this even possible? This is where the concept of dark matter ...
After decades of study, scientists sound genuinely optimistic about the possibility of detecting primordial black holes, which might explain dark matter.
Maybe it's arrogant to believe we'll know what dark matter is, but then again, maybe not. It's thought that 95% of the Universe's total mass and energy are dark matter and dark energy, respectively.