Among the more exciting advances to be described are: the discovery of the specific Maya language and sophisticated grammar used by the ancient scribes on stone monuments and painted vases; archaeological explorations of tombs and buildings of the ancient founders of the great city of Copan, whose very existence had been predicted by epigraphers through glyphic decipherment; the realization that many small city-states were dominated by two rival giants, Tikal and Calakmul, through a potent combination of military conquest, diplomacy, and royal marriages.