“Two qualities are indispensable: first, an intellect that, even in the darkest hour, retains some glimmerings of the inner light which leads to truth; and second, the courage to follow this faint light wherever it may lead.” -Carl von Clausewitz
You’ve been hanging around here long enough that you know all about dark matter’s successes, from the CMB to large-scale-structure to gravitational lensing. On the largest scales in the Universe, there’s no alternative that even comes close to working, unless you also include dark matter!
But what about the smallest scales? You see, one of the biggest problems with dark matter is that it predicts a very large number of very small galaxies, both as satellites around large galaxies and also as lone structures in intergalactic space. The ones we’ve been able to find are simply too few and too large to match up with what we see.
But is it possible that they’re out there, and we simply haven’t been looking with the sensitivity necessary to find them? Not only is that possible, but just a few years after discovering the smallest mini-galaxies as satellites of the Milky Way, a new technique may have just uncovered the first intergalactic dwarfs predicted by dark matter!