The Real Story Behind Game of Thrones’ Dragonglass

[This is a sneak preview of our June issue. Subscribe here to get access to many more great stories from Discover]Shiny and sharp, obsidian is enjoying a bit of a pop culture moment. It plays a central role in HBO’s hit fantasy series Game of Thrones, now wrapping its final season. Called dragonglass on the show, obsidian is one of only two substances that can cut down White Walkers, malevolent otherworldly warriors.In the real world, the volcanic glass reveals the human story in a w