The existence of dark matter is an accepted reality.
The observation of dark matter is indirect. Galaxies show gravitational behavior beyond what is attributable to visible stars. Dark matter is dark because we lack instruments for direct electromagnetic observation.
Wikipedia:
Dark matter is a hypothetical type of matter distinct from ordinary matter such as protons, neutrons, electrons, and neutrinos.
Dark matter has never been directly observed; however, its existence would explain a number of otherwise puzzling astronomical observations.[1][2] The name refers to the fact that it does not emit or interact with observable electromagnetic radiation, such as light, and is thus invisible to the entire electromagnetic spectrum.[3]
Although dark matter has not been directly observed, its existence and properties are inferred from unexplained mass in gravitational lensing calculations, which affects the motions of baryonic matter and light.[4]. It influences the universe’s large-scale structure, the formation of galaxies, and affects the cosmic microwave background.
Such a description is puzzling because dark matter is indicated as unexplained mass, distinctly different from ordinary matter such as protons, neutrons, electrons, and neutrinos. That is puzzling because there is no proper idea what “ordinary” matter is. The Large Hadron Collider aims to unravel some of the secrets of ordinary matter, and hopefully, this intellectual investment in Geneva will pay off.
The single dodecahedron fits well in the description of dark matter. It can absorb photons in the thermal process, but the visible light emits in a fuzzy way. It is not so easy to explain with the information given in this site so far, but visible recognition requires atoms with electrons that can perform the full spinor functionality. Electrons in a dodecahedron are locked in place, and therefore the spinor functionality cannot fulfill such a rotation anymore.
Twin dodecahedrons can also configure into dark matter, as a construct of two protons. The section about the Sun will give some clarification.
Therefore, there will be many questions to be answered, but it could well be that this dark matter mystery is indicating the existence of single and twin dodecahedrons in abundance.