This week, stories about people breathing new life into rivers, cities, and the way we see the universe. We’ve got a story from the streets of Seoul, about the centuries of history that flowed by before one of its dirtiest waterways became a tourist destination. Then, we’ll see how the revitalization of Montreal’s Lachine Canal has changed the lives of the nearby residents. Finally, we’ll hear a model of what planets, stars, and life itself might sound like. Before we go, we’ll brief you on the week’s environmental events.