IRONY ABOUNDS: A reader emails: “Today, Michael Mann was scheduled to give a colloquium on climate change at the University of Pennsylvania, where I am a graduate student. As you may know, Philadelphia has been hit by multiple snowstorms in the past week. Today, for what I am told is the first time since the mid-1990s, the university suspended normal operations due to snow, and his colloquium on climate change has been postponed.”