Scientific achievement
In an attempt to convey the sense of a rabbit jumping, a young Dragonborn accidentally develops the worlds first system of communication that assists the species in becoming, albeit slightly, a little less primal.
Whilst out foraging for food with his father, a young Dragonborn sights a small white creature, now known modernly as the rabbit, jumping. When the young boy got home, the usual methods of communication weren't enough to convey his disbelief at the animal he had seen and the boy attempts to imitate the creature. When the family goes out foraging the next day, the father similarly sees a white rabbit, and begins to understand what the young boy meant the previous evening. With an increase in actions and a species-wide understanding, the Dragonborn develop the worlds first system of universal communication.