Revisit four songs from the late '70s, which all have iconic guitar riffs that more or less helped define heavy metal as we know it.

They've become some of the most popular YouTube personalities while gracing your screen with their guitar mastery, but what are the riffs that helped define the playing of the online heroes? Loudwire ...

You know the riffs, but you may not associate these guitarists with them. But there’s no doubt these iconic riffs inspired a whole new generation of guitarists who are tearing it up today. While at ...