Yes.

I all seriousness though, Its pretty safe to say we have a pretty good idea of how a lot of things work in physics, astronomy, cosmolgy, etc... (and a lot we dont.) However dark energy / matter is still is a theory. An explanation of something we haven't observed directly but something indirectly that we don't understand (like the orbit of stars in a galaxy) and it is a possible explanation of what we are seeing. Its not uncommon for science to put forth a theory or hypothesis of something that is proven in mathematics before its actually discovered or observed. Black holes being the most well known case of this. It was first proposed in 1783 by Henry Cavendish that there are stars so massive that light could not escape. This is different then what we know what black holes are today, but the concept is the same.

Also, its highly unlikely that a fundamental understanding of something is flawed because these standard models work very well with everything else. Its quite possible that the reason this stuff isnt visible is because it exists in a higher dimension than the 4 that we perceive. Something that gets into string theory.

>> ^GeeSussFreeK:

I am alone on this?