In the search for life and intelligence beyond Earth, astronomers look for telltale “signatures.” These include the chemical elements that we associate with life as we know it and its biological functions (“biosignatures), and indications of technological activity (“technosignatures”) as we would recognize it. At present, the search for signatures is limited by two factors: the limits of our instrumentation, and the limits of our frame of reference.
storiesbywilliams Matt Williams is a professional writer, science fiction author, and science communicator who currently writes for Universe Today, Interesting Engineering, Stardom Space, and Stellar Amenities. He is also the Director of Media Communications for Mars City Design and a member of Enterprise in Space and Explore Mars. His novels, The Formist Series, are available at Amazon.com and through Castrum Press. He lives with his wife and family on Vancouver Island in beautiful British Columbia.