Peter Hansen, a mountaineering expert and professor of history and director of International and Global Studies at WPI, spoke to the BBC’s The Forum program about the history of mountain climbing dating back to the 1300s. Hansen, author of several books on mountaineering, including “The Summits of Modern Man: Mountaineering after the Enlightenment,” gave important insight into the role climbing has played in society’s ever-changing relationship with nature. To hear the worldwide broadcast this weekend, tune in to the BBC World Service.