Century, with Illustrations” by Kim Stanley Robinson?
In the Acknowledgments for REMAKING HISTORY and REMAKING HISTORY AND OTHER STORIES (published by Tor), it says, “‘A History of the Twentieth Century, With Illustrations’ was originally published in IASFM, copyright (c) 1991. The story has been revised for this edition.” Thanks to Rich Horton [rrhorton@prodigy.net], who actually found these differences: Book version, pages 83-84 (the bracketed part is missing from the magazine version, page 155): … To the locals, he realized, the Orkneys were the center of the world. He bought a guidebook and drove north, [up the east coast of Mainland to the Broch of Gurness, a ruined fort and village that had been occupied from the time of Christ to the Norse era. The broch itself was a round stone tower about twenty feet tall. Its wall was at least ten feet thick, and was made of flat slabs, stacked so carefully that you couldn’t have stuck a dime in the cracks. The walls in the surrounding village were much thinner; if attacked, the villagers woul