Quote Originally Posted by xman View Post
Uh, no. Matter and dark matter do tend to clump together, and by observing how the matter is actually responding to the presence of other matter via gravitational effects it can be determined that more matter is present than the matter which we can see, hence dark matter.
Viola!

Currently, dark matter=fudge factor.

Maybe one of these highbrow types needs to re-examine the common understanding of gravity itself on the astronomical scale, before they start inventing invisible stuff responsible for 95.4% of the (un)known universe. Maybe someone just left off a decimal place somewhere, or used english instead of metric, etc.