E-mail from listeners prompts two corrections: One about Latin confusion and the other about the Gateway Arch in St. Louis. MANY listeners wrote in to point out that the Arch is not a parabola, as ...

The Gateway Arch in St. Louis was conceived in the 1940s and completed in the 1960s. It was designed to symbolize the opening of the West. Here, it is shown under construction on June 17, 1964.