Sometimes you have to wonder if there isn't an ejector seat built into having a popular-music career. We were lucky when we started. We were already old when we started - you could have described our first album as "aging Brooklyn guys." We were in our late 20s. We weren't octogenarians, but a lot of bands were already younger than us. Fortunately, we've held on to our manly good looks.

So we've done science songs. We've done historical songs. A lot of people would like us to do more historical songs. Our history record would probably be like the people's history of the United States, set to music.

I think the biggest wrestling match-up I have is how to respond to the word "quirky." Or the alternate, "nerdy." Both are essentially benign to the reader, but if you're a writer just sort of involved in your creative process, they seem like very small motivations.

You're like, "I don't want to argue with Dr. Drew on national radio." You're like the invited guest. But at the same time, as a thinking person, it's very difficult just to stand by and go, "Yeah, man, it's cool."

It sucks to think about, honestly, but when you really consider the resources that it takes to press vinyl records, or the amount of gas that it takes to tour, it's really quite scary.

People love fact-based songs, which is a very funny idea.

If you do believe in science, you really have to actually stand up and make a stand for it. You can't just say, the facts aren't in. Science is always looking for better explanations to everything, but that doesn't mean that when we get on a plane we don't know what's supposed to happen next. And if it doesn't go the way that it's planned, that's a big, big problem. The culture wars are very tricky and make me a little sad.