http://www.sciencedaily.com/releases/2011/02/110223092406.htm
http://tinyurl.com/4sjcv7f
"If we're right about dark matter, why does MOND work at all?" asks
McGaugh. "Ultimately, the correct theory -- be it dark matter or a
modification of gravity -- needs to explain this."
For an explanation see pp 23-25 of:
http://mtaonline.net/~hheffner/FullGravimag.pdf
The source of the negative gravitational mass halo (dark energy) that
makes the MOND formula work are the black holes in the center of
galaxies. For more on this mass genesis process see:
http://www.mtaonline.net/~hheffner/GravityPairs.pdf
That's my opinion.
Best regards,
Horace Heffner
http://www.mtaonline.net/~hheffner/