There is plenty out there on the web about dark matter;


[astron.berkeley.edu]

[math.ucr.edu]

[csep10.phys.utk.edu]

[www.astro.queensu.ca]

[www.eclipse.net]

[en.wikipedia.org]

[web.mit.edu]


And if you want to know where the esitimates for the percentage of the universe that is assumed to be dark matter do a search for WMAP and dark matter in google.

Its quite funny - if you do a search in google for dark matter it comes up saying "Dark Matter for sale at www.ebay.com. Check out the deals now!" All those millions being spent trying to find it and all they had to do was pop along to Ebay!

Simon