As I understand dark matter and dark energy are quite theoretical . That modern theories require the existence of these phenomena. I read a lot of information about this. And I realized that scientists know more about what dark matter is not than what it is. Can it turn out to be that dark matter and energy have very different features than expected? Or they are not real, just an illusion caused by gravitational interactions between short-lived particles of matter and antimatter. If you imagine it,how it will change our understanding of space, expansion or other things?
closed as primarily opinion-based by Brandon Enright, ACuriousMind♦, Kyle Kanos, John Rennie, Rob Jeffries Jan 24 '15 at 9:46
Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.
A quick comment about one part of this question - I might improve my answer later... Gravity from vacuum fluctuations of quantum fields (such as matter-antimatter pairs) is deeply connected to the dark energy question. That influence should be there according to theory, so it would be an excellent explanation of dark energy... except that also according to theory, it should be much much stronger than dark energy actually is. So one idea is that the vacuum energy has positive and negative parts that mostly cancel out, and the dark energy is the part left over.
I can't exactly think of anyone using vacuum fluctuations to explain dark matter, but someone probably tried the idea, as a type of quantum modification of gravity. I'll add a comment if I find such a theory.