Transcriber’s Note This e-text was produced from “Tiger by the Tail and Other Science Fiction Stories by Alan E. Nourse” and was first published in Galaxy, January 1956. Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed. Punctuation and capitalization have been normalized. Variations in hyphenation have been retained as they were in the original publication. The original text has been modified to include the author’s name after the title as follows: by Alan E. Nourse Italicized words and phrases are presented by surrounding the text with _underscores_. Curly braces surrounding characters, as here, CO_{2} are used to represent subscripts. End of Project Gutenberg's Brightside Crossing, by Alan Edward Nourse