Which genius ideas and inventions began with the Vikings? What did they develop that we use to this day? Find out how the Vikings built their longships and set sail from their homeland, forging a path across the sea on raiding and trading expeditions. Discover their brilliant developments in navigation, transport, government and language that have influenced the way we live today. The Genius Of series helps children aged 9 plus to explore the major discoveries, inventions, influence and legacies of key periods in history.