The mighty Led Zeppelin essentially invented a new genre by recording 'How Many More Times,' which closed out their revolutionary first album and also many of their early live shows. It clocks in at No. 9 on our list of the Top 50 Led Zeppelin Songs.

Stitched together from various sections of music dating back to Jimmy Page's stint in the Yardbirds, 'How Many More Times' incorporates blues, rock, early metal and psychedelic passages into an 8 1/2 minute epic that was actually broken down into miniature movements put together, as if Yes had played hard blues rock.

Robert Plant borrows again from old blues imagery, most notably Albert King's 'The Hunter,' while Page trades licks with himself in panned track effects, leading to an ominous-sounding middle section in which he bows the guitar -- a trick he also employed on 'Dazed and Confused.'