CONTENTS: ~ ~~ ~ SERIAL: O Pioneer! (Conclusion) [Frederik Pohl]; NOVELETTES: Easter Egg Hunt: A Christmas Story [Jeffery D. Kooistra]; Crossing Chao Meng Fu [G. David Nordley]; SHORT STORIES: Arnold the Conquerer [Steve Hockensmith]; The Cure [Michael A. Burstein]; ARTICLES: E Plurbus How Many? [Stanley Schmidt]; Biology at the Extremes [Mark S. Lesney]; Breaking the Standard Model [John G. Cramer]