A study of the hard-partying rocker revealed he actually has several genetic mutations that may explain how he's lived so long, scientists say. Some of them "we've never seen before," said geneticist Nathaniel Pearson, who was part of the team that sequenced Osbourne's DNA for Massachusetts lab Knome Inc. "I've always said that at the end of the world there will be roaches, Ozzy and Keith Richards," the Prince of Darkness' wife Sharon Osbourne said. Read more: Ozzy Osbourne is a mutant, say scientists; hard-partying rocker's genes may explain his survival