March 1989. Cover art by Nicholas Jainschigg illustrating “Nothing in the Night-Time” by Harry Turtledove. ALSO: “Humanity Test” by Charles Sheffield; “On the Wings of a Butterfly” by Michael F. Flynn; plus stories by Rick Shelley, Laurence M. Janifer, Geoffrey A. Landis and others. FEATURES: “Over-Communicated” (article) by Ben Bova & G Harry Stine; “Mars: The Soviet March” by Donald F. Robertson; and more. Editor: Stanley Schmidt.