The universe around us echoes with the Great Silence. It seems oppressive to some, foreboding to others. We have not picked up any alien transmissions; seen any indications of interstellar travel or construction; met any other civilization. Yet even with propulsion systems based on known technological principles, it should be possible to colonize the whole … Continue reading An Optimist and Pessimist Tackle the Fermi Paradox by Julie Nováková and Tomas Petrasek