Dark matter remains "dark"

Braunschweig, Germany (SPX) Jun 24, 2023

Astronomic observations indicate the existence of so-called "dark matter" which makes up more than 80% of all matter and, as far as we know, interacts with ordinary visible matter only via gravity. In particular, no proof for the interaction with photons (the elementary particles of which also light is composed), has yet been established - hence the term "dark" for this type of matter. It remain