Old heavy metal doesn't go away; it just bubbles back to the surface several years later. Well, OK, actually, some chemistry PhDs out there might well argue otherwise. But the recent releases below could certainly be used as supporting evidence for the hypothesis. All of these albums came out (or came out again) in 2011, but were almost entirely recorded anywhere from a few years to a few decades ago onstage in about half the cases, in the studio in the other half. In the cases of both Ozzy Osbourne albums, all three Queen ones, and the Death one, original versions have been augmented with all sorts of bonus tracks and alternate renditions sure to induce further cranium-banging.