His stage persona includes wearing a do-rag and standing on one foot while performing. But the world's best known (and very nearly only) rock flutist has a serious side, too.

Progressive rock veterans Jethro Tull are celebrating their 40th year, which is apparently more amazing to me than it is to the band's founder and front man, Ian Anderson, who says that he has always considered being a professional musician, a "job for life."

My conversation with Jethro Tull's Ian Anderson begins with the status of a new Tull album, and ends with a warning about overpopulation.

^{Photo by Sean Gallup / Getty Images}