Hi,

If space isn't expanding, how do you explain the varying levels of red shift in the light received from different stars.
Space is not only expanding, it is also accelerating in it's expansion.

Dark matter is only term to cover that which they haven't exactly identified as yet, i.e. they are aware of it, but they don't exactly know the cause.

You are partly right regarding gravity being stronger, they way I see it, it is the inter-dimensional binding forces that account for the additional attractive force/gravity.

Lisa Randall http://en.wikipedia.org/wiki/Lisa_Randall has put forward the concept of a "Gravity Brane" or membrane which seems to fit the current observations.

>>http://www.physorg.com/news167555163.html
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>I don't believe in Dark Matter.
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>I believe gravity is stronger not because of invisible matter, but because galaxies aren't really as far apart as we think, because we think space is expanding but it isn't.