Why do the characters in Dune have those glowing, deep blue eyes? It’s not sci-fi eyeliner—it’s something far more powerful. In the harsh, otherworldly deserts of Arrakis, exposure to a rare and ...

His broad chest is dabbed with chalk, and his pale blue eyes are narrowed, as if he’s spotting something in the distance. Dubbed “Ludvig,“ he lived in northern Europe some 8,000 years ago.