String theorists are very smart. We know this because: (a) you need to know a lot of physics and even more math to understand string theory (and Math is Hard! - Barbie) and (b) because they keep telling us so.
Because people (Ok, their moms and other string theorists, anyway) have always told them they are so smart, some string theorists have found it convenient to set themselves up as experts in all sorts of stuff - climate change, for example. And volcanology.
CNN at least is convinced. Lubos finds CNN interviewing Michio Kaku, string theorist and science popularizer, about the Yellowstone supervolcano (more Yellowstone here and here). Not that I blame Michio. If Rebecca Hillman or other hot Anchorette wants to interview me, I'm available. I can talk about anything, including superstrings, the Superbowl or volcanology - and I even experienced the last big Yellowstone quake.
Actual volcanologist Erik Klementi was not amused. I guess he wanted to be interviewed. Or maybe he thought Kaku was being a little facile and misleading - the sort of thing you can get away with when you are as smart as a string theorist.