Galaxies Made of Nothing? New Theory of Mysterious Dark Matter. “If the concept of dark matter gives you a bit of a headache,
hold on to your Advil.

Theorists attempting to explain some of the “missing mass”
in the universe now say there may be entire galaxies that are
dark.: A new theory “…suggests that for every normal,
star-filled galaxy, there may be 100 that contain nothing, or
at least nothing that we understand.” space.com