On an album with heavy metal cuts like “War Pigs,” “Iron Man,” “Electric Funeral,” and “Hand of Doom,” Black Sabbath’s “Planet Caravan” love song stands alone as a ...

The original Black Sabbath line-up (L-R: Bill Ward, Ozzy Osbourne, Geezer Butler, Tony Iommi) at their reunion announcement in 2011. Credit: Axel Koester/Corbis via Getty Images. Bill Ward ...