Science Friday 2018-07-27 Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email PFAS, Urban Evolution, Science Diction. July 27, 2018, Part 1 Ant Socialization, Smoky Skies, Dust Storm, Mars Lake. July 27, 2018, Part 2 Produced by Science Friday and WNYC Studios