Readers Poll: The Best Prog Rock Bands of All Time

In the early 19th century, Jethro Tull invented the seed-drill, effectively giving birth to modern agriculture. About 270 years later, a British band named Jethro Tull released Aqualung, effectively giving birth to flute-driven prog rock as a commercial juggernaut. They never released an album as successful, but it's not for lack of trying. The band has 23 albums under their belt, and they tour constantly. Their 1987 LP Crest of a Knave won the Grammy Award for Best Hard Rock/Metal Performance Vocal or Instrumental, beating out Metallica's ...And Justice For All. Jethro Tull have endured a lot of mockery for this, but clearly the Grammys are the villains of this story. The Tull had no anti-Metallica agenda, and they didn't select their Grammy category. Leave them alone.