Jethro Tull, aka the saga of everyone's favorite madcap flautist and his netherworldly parishioners, began in England in the late '60s. It was one of many experimental periods in rock 'n' roll, when the miscegenation of folk, sylvan mysticism, Heavy Metal thunder, and Skiffle seemed viable. "Aqualung" from 1971 remains the group's calling card. Who could deny a fully bearded man, dressed in tartan, hopping on one leg while playing flute and breathing life to the indelible image "Si...  [+]