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  • "By His Bootstraps" is a science fiction short story by Robert A. Heinlein that plays with some of the inherent paradoxes that would be caused by time travel. The story was originally published in the October 1941 issue of Astounding Science Fiction under the pen name Anson MacDonald. It was reprinted in Heinlein's 1959 collection, The Menace From Earth and in several subsequent anthologies, and is now available in at least two audio editions. Under the title "The Time Gate", it was also included in a 1958 Crest paperback anthology, "Race to the Stars".

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