One of my favorite bloggers, Christopher O’Brien, has resumed blogging at his old stomping ground, Northstate Science. He was away from blogging for almost two years. I couldn’t bring myself to remove his site from my news feed. I’m now glad I didn’t. Drop by Northstate Science and properly chastise Christopher for depriving us of his thoughts for, lo, these many months. Or, if you think it better, welcome him back to the virtual world.