Publication Date: 8 September 2017 JBIS Journal of the British Interplanetary Society VOL. 70 No. 5/6 MAY/JUNE 2017 Contents INTERSTELLAR STUDIES Interstellar Communications using Microbial Data Storage: Implications for SETI Robert Zubrin Sailships vs. Fusion Rockets: A Contrarian View James Benford HERITAGE: A Monte Carlo Code to Evaluate the Viability of Interstellar Travels using a Multi-Generational Crew Frédéric Marin Nanobots and Fairylies Robert Alan Mole On the Feasibility of Human Interstellar Flights from Economic, Energetic and Other Perspectives Jiří Mazurek On-Board Power for Interstellar Generation Ships: Application of Cassenti’s Toroidal Ion Scoop Gregory L. Matlof A Rationale for Alien Megastructures Gregory L. Matlof Performance Predictions for Interstellar Missions using the Special Theory of Relativity Brice Cassenti and Laura Cassenti Do No Harm? Cultural Imperialism and the Ethics of Active SETI John W. Traphagan www.bis-space.com ISSN 0007-084X