On this week's episode: do school district boundaries follow the lines suggested by a Voronoi diagram? What are the origins of the Prairie Home Companion song about rhubarb pie? Are some types of blankets warmer than others?

 

0:42 - Voronoi school districts

3:09 - Rhubarb pie

7:06 - Shorts

7:40 - Blankets

9:33 - Sources

10:05 - Lev Theremin playing the theremin

 

Sources: supplementary images for "Voronoi school districts," bit.ly/liuschools1. School district boundaries, bit.ly/liuschools2. Prairie Home Companion, prairiehome.org. A book about Lawrence Tibbett, bit.ly/liulawrence.