Lodi-Ribeiro, Gerson. "Missão secundária"
Title trans.: "Secondary Mission"
Summary: A spacecraft using a tunnel effect for interstellar travel returns to Earth, but not the same one it left. Allohistorical content is limited to just a few paragraphs at the end of the story.
Published: In Efeitos Secundários / Side Effects — Antologia dos Segundos Encontros de FC&F de Cascais (eds. Maria Augusta and António de Macedo), Simetria 1997 (9729749507).
Original in: Portuguese.
Translation: English by the author as "Secondary Mission", in Efeitos Secundários / Side Effects (eds. Maria Augusta and António de Macedo), Simetria 1997 (9729749507).