IF - Worlds of Science Fiction: October 1958 (Volume 8, Number 6)
Illustrations by Ed Emshwiller, Kelly Freas, Paul Orban. Cover by Ed Valigursky ("Moonquake")

Stories are prefaced with a date, after a header on contents page: "A Short History of Space Travel"
A.D. 1950: "The Pure Observers" by B. J. Rogers
A.D. 2050: "Albatross" by A. Bertram Chandler
A.D. 2110: "Man Alone" by Don Berry (novelet)
A.D. 2120: "A Toothache on Zenob" by Boyd Ellanbee
A.D. 2150: "Shandy" by Ron Goulart
A.D. 2170: "The Fishdollar Affair" by R. M. McKenna (novelet)
A.D. 2500: "The Burning of the Brain" by Cordwainer Smith
A.D. 32,000,000: "Brink of Creation" by Dean McLaughlin

Editor is now Damon Knight, published by James L. Quinn (who edited from November 1952 to August 1958.) Asssitant editor is Elaine Wilber.