British heavy metal legend Ozzy Osbourne died earlier this week at 76 years old, more than 20 years since the “Prince of Darkness” was first diagnosed with a rare form of genetic Parkinson’s disease. The cause of the Black Sabbath frontman’s recent death has not been made explicit.

Black Sabbath frontman Ozzy Osbourne died following his battle with a genetic form of Parkinson's disease, while a brain expert says the singer's lifestyle could have contributed.

Ozzy Osbourne, lead singer of Black Sabbath, has died at age 76. He said he had been previously diagnosed with a form of Parkinson’s disease linked to the gene PRKN