Pharyngula channels Dawkins
Feature is on "10 big ideas" with articles by assorted experts (not always the ones I'd have chosen, but that's half the fun).
Pharyngula nicely passes along Dawkins summary of evolution
Speculations on astronomy, astrophysics, news I find interesting,
theoretical issues, science and science policy.
In particular: gravitational radiation sources, black holes, planets and astrobiology.
I will digress into computational physics, science fiction and general issues and basically whatever I feel like whenever.
And, of course, cats.
Steinn Sigurðsson is an astrophysicist at Penn State.