Science Friday 2021-02-05 Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email COVID Variants And Vaccines, U.S. Energy Justice. Feb 5, 2021, Part 1 Four Lost Cities, Sourdough Microbiome, Queen Bees, Bison. Feb 5, 2021, Part 2 Produced by Science Friday and WNYC Studios