Jennifer Ouellette hosts Caleb Scharf — Director of Columbia University's multidisciplinary Astrobiology Center. They'll talk about observational cosmology, X-ray astronomy, exoplanetary science, Gravity's Engines: How Bubble-Blowing Black Holes Rule Galaxies, Stars, and Life in the Cosmos and his work in progressThe Copernicus Complex (both from Scientific American / Farrar, Straus and Giroux.) Follow @Caleb_Scharf @JenLucPiquant More at VirtuallySpeaking.us