Dark Skies, Starry Nights: What have we lost by lighting up the world with artificial light? What can we gain by helping the skies stay dark at night, and infusing our days with natural light? How is artificial lighting impacting wildlife? What is being done to protect our sleep problems and loss of the night sky view? These are some of the questions we'll be taking up with members of the International Dark Sky Association Lisa Heschong and Jeff Parry.