Today we debuted the Denialism Blog, while David Dobbs of Smooth Pebbles bids farewell to ScienceBlogs. David offers cogent rationales for why he decided to leave ScienceBlogs (the proximate reason is that he just isn't posting much as far as bloggers go). One thing to note that is I don't think a blog is really worthwhile for most people without an intelligent commentariat. I've learned a lot from critiques, suggestions and recommendations from comments on my blogs over the past 5 years. Of course, the key is intelligent. Most humans aren't very smart, so they're basically just expending the minutes in your life.