Video Timeline: Forty Years of Black Sabbath

The news that the original line-up of Black Sabbath is reforming is certainly amazing, but it's important to remember that this is a band that's been through many, many incarnations. At various points in time, only guitarist Tony Iommi remained from the original band. Black Sabbath superfan and fansite webmaster Joe Siegler has an incredible history of the band here, but here's a video run-through of their four-decade saga.

If we went into every bassist and keyboardist change, this thing would have run longer than Barry Lyndon. We stuck to the singers – though even there, we skipped a few very minor ones who lasted just a handful of days. 

By Andy Greene