Released: 31 July 2016 Duration: 24 minutes, 11 seconds   Host Paul Carr discusses the recent paper "Our Sky Now and Then" with lead author and astronomer Beatriz Villarroel,a PhD student at the University of Upsalla in Sweden, Ms. Villarroel's team was undertaking an alternative approach to SETI, looking for evidence of effects in astronomical data that could not be due to natural effects.   Links: Our Sky Now and Then The USNO B1.0 Catalog The Sloan Digital Sky Survey The Lost Star (Vizier) The Nearby Infrared WISE object Jason Wright: A WISE Search for Large Extraterrestrial Civilizations Credits: Host and Producer: Paul Carr Music: Jason Robinson