SciFi Radio on NPR

SciFi Radio a series broadcast on NPR in 1989 and 1990.  Below is their interpretation of the Arthur C. Clarke Story The Wall Of Darkness.  The story was first published in 1949... back in the prime SciFi era. I've never found a canonical list of their shows, but thsi is my favorite. In the spirit of Flatland, it's a story about math.