Pauline gave a public lecture last week on the 2011 Nobel Prize-winning work of Perlmutter, Schmidt, and Riess, for the discovery of the accelerating expansion of the universe.
Did you miss it; here’s a fun live-comic narrated by physicist Sean Carroll explaining how that work was done, and briefly what it implies about the nature of our universe’s constituency.
http://www.youtube.com/watch?v=v6o2bUPdxV0
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A more technical review, which goes into detail for the physicists in the audience, is at http://arxiv.org/abs/1112.0706