@peter jeffrey cobb,
If it was found, it would no longer be dark, as dark just implies that it is not there, but should be, as predicted by equations. There is no requirement that humanity be able to understand the universe, in fact it is no more logical, for humanity to understand the universe, from the Earth, than it is for a small crab, that lives under the ocean, under a rock, to understand the crest of mount Everest.
When the first caveman or Neanderthal came down from the first tree, 99.999 percent of all universal knowledge was unknown, today this percent has not changed, not at all.