Jethro Tull is a British rock band that formed in 1967, known for their unique blend of rock, folk, and jazz, with complex, often eccentric lyrics. The band is fronted by Ian Anderson, whose distinctive flute playing and stage presence are signature elements of their sound. They gained prominence in the progressive rock scene with albums like "Aqualung" and "Thick as a Brick," which showcased their dynamic song structures and lyrical depth. Despite several lineup changes, Jethro Tull has had a significant impact on the evolution of rock music, influencing numerous bands and artists.