From This Old House, Clearstory is a window that sheds light on the surprising stories behind our homes. Host Kevin O'Connor digs into the systems, structures and materials in our homes from unexpected angles. Will future skyscrapers be built out of wood? Why is the American Chestnut heralded as “the perfect tree”? Did the Romans have a better recipe for concrete than what we use today? How will we build on Mars? You’ll hear from industry leaders, historians, and builders. Clearstory – your home in a new light.