Some of the numerous writers that wrote their ideas about possible alien life include Arlan Andrews Sr., Edward M Lerner, Richard A Lovett, Karl Schroeder, Mark H Shellans and others. I am intrigued by suggestions (see e.g. Schroeder) that there may already exist a galactic network of communications. If we assume that as early as one billion years ago there has been an SFC in our galaxy, there may indeed be such a network (and if not, there may be one 1 billion years from now). Such a net would consist of active nodes, namely the home planets (moons) of SFC's,
inactive nodes (bodies with evolving life forms, bodies where SFC's became extinct and airless bodies containing evidence of past or present civilization). These nodes would be connected by links to SFC's. Clearly the odds that two SFC's communicate with each other are almost zero. Communication would be by means of messages sent from the past into the distant million years future. There would be be messages locating inactive nodes (such as the existence of manufactured objects surviving millions of years on small airless rocky bodies) and occasional messages like the one we sent on our Voyager 1 probe. With time (hundred of million years) any small network may grow in size and grow in the amount of information. Gradually some SFC'c may start compiling the intra-galactic information and send it through the network. In conclusion, I believe that one of the highest priorities in exploring Mars, moons and asteroids is for us to look for any advanced objects that may tell us about life in our galaxy.