Cosmological Simulations catch up with Observations.

Here's a Nature page that introduces a letter and an article on the decade old problem that cosmological simulations predict cuspy DM cores in galaxies but observations show constant density DM cores instead. The solution is to add star formation to the code and watch the winds blow material out of the centres. I'm looking forward to reading these articles, but the intro alone cleared up some of the difficulties in understanding the press release.

http://www.nature.com/nature/journal/v463/n7278/edsumm/e100114-05.html