An intricate chart drawn by Finnish-Swedish graphic artist Minna Sundberg traces the common roots of the tongues spoken by a vast swath of humanity. The myriad “Indo-European” languages all share a common ancestor, though historians debate who that is. Some say the language group emerged from the steppes north of the Black Sea 4,000 years ago with the migrations of chariot-driving nomads; others argue it dates further back — some […]