Re: Alternate theory
"Some idiot called it dark matter..."
The problem with 'Dark matter' is that it's widely regarded, largely thanks to uninformed (and thus misleading) reporting in the general media, to be the explanation of anomalies in observations. The problem with this, as far as explanations go, is that because we can't say what 'Dark matter' is, it doesn't actually explain anything.
'Dark matter' is really just a description of the observed anomalies, insofar as the observed anomalies appear to indicate the presence of matter that cannot be seen. However, this is not the same as saying that there is matter there that cannot be seen.
There'd probably be less confusion, in the wider public at least, if the idiot had called it the 'Dark matter problem' instead.
It's not a solution or explanation - it's just a very naughty description.
Same applies to 'Dark energy' too.