Join host Ed Leon as he chats with popular Great Courses professors. In this episode Professor and historian Edward O’Donnell talk about The Gilded Age and the Progressive Era - a time of tremendous change in America including: post civil war reconstruction, industrial and economic booms, taming the Wild West, the emerging women’s rights movement, and World War I. And chemistry, it’s no longer a mystery! Chemist and acclaimed professor David Ball breaks down the entire realm of physical matter into three basic elements and explains how all matter contains particles that came from supernovas.