Every American schoolchild knows that Columbus sailed west to reach Asia with the hopes of finding precious metals, expensive fabrics, and exotic spices: all goods that were being traded in the Indian Ocean, and had been for millennia. Ancient Greek texts describe an active Indian Ocean economy. Some scholars have even linked the peopling of Australia to a slow, methodic collecting of resources along the coastal route from east Africa. In the first of a two part episode, guest Susan Douglass, author of the Indian Ocean in World History web site, describes the murky beginnings of trade and travel in the Indian Ocean basin, and the cultural exchanges and influences that the trade had in the days before the Europeans arrived.