Lookee at Wiki
From Wiki, Baryonic Dark Matter
Originally Posted by Wiki
This is what your idea that not all the baryonic matter is accounted for runs into. Under the ATM rules, you would need to explain why the early universe nucleosynthesis is incorrect, and what needs to be done to correct it. As I said before, I don't like the DM idea, but it is the best 'place holder' currently available. The mainstream all fits together just as a glove fits your hand just right. Astronomers have got to be about the pickiest most skeptical group ever, with the possible exception of paleontologists. If in general they accept (and note that I do not say 'believe in') dark matter, then you can bet that they have peeked and poked and prodded at every aspect of it.
(sigh) Try the relevant Wiki articles. I recommend Missing Mass.
I'm not a hardnosed mainstreamer; I just like the observations, theories, predictions, and results to match.
"Mainstream isnít a faith system. It is a verified body of work that must be taken into account if you wish to add to that body of work, or if you want to change the conclusions of that body of work." - korjik