Legend has it that at the edges of medieval maps, marking the boundaries of the world the maps’ creators knew at the time, there’d be inscribed the words “Here be dragons”—often alongside vivid illustrations of the terrifying beasts supposedly lurking there.

There’s not much evidence medieval cartographers actually wrote these words, but I like to think they could have. Maybe because “here be dragons” sounds like something I might’ve written at the time—a grim warning that even if I didn’t know exactly what would happen if I ventured into the great unknown, it likely wouldn’t be good!

But there’s one glaring problem…