Dark Matter

Dark matter is an unidentified type of hypothetical matter distinct from dark energy, baryonic matter (ordinary matter), and neutrinos. The name refers to the fact that it does not emit or interact with electromagnetic radiation, such as light, and is thus invisible to the entire electromagnetic spectrum.

This mysterious substances known as dark matter along with dark energy has been theorised as a solution to account for some 95% of the universe, around only 5% is the "ordinary" matter that make everything we can see including the atoms that make up you an me and everything around us,