9. Mars Volta
For some rock fans, prog rock started in the late 1960s with King Crimson and ended in the early 1980s when Yes, Genesis and Rush all started scoring massive radio hits with short, poppy songs. While the genre certainly peaked in popularity during that time, the genre has never really gone away – or stopped evolving. The Mars Volta may not be "prog" in the ultra-strict Tales From Topographic Oceans sense of the word, but it's impossible to listen to the Omar Rodriquez-Lopez-led band and not hear just how much the genre has influenced them – or the length of their songs. They are also one of the few prog bands with an extremely young audience, who probably wouldn't know a Robert Fripp if he fell on them.