
Bill Adams is the first human to pilot a ship to Mars and back, and his triumphant homecoming quickly turns into a personal nightmare. While the spacecraft coasts toward Earth on its new atomic drive, a sudden itch erupts into a spreading, reddening rash that covers his face and neck, accompanied by sneezes, puffy eyes, and an inexplicable burning in his throat. With limited supplies and a cabin too cramped to move freely, he scrambles through mirrors, Geiger counters, and dust‑trap filters in a desperate attempt to identify the cause.
The story follows his growing dread as every diagnostic tool comes up empty, forcing him to confront the unsettling possibility that a Martian microbe—something his Earth‑trained body has never met—might be at work. As acceleration builds and the ship's systems hum, the isolation of deep space amplifies each tick of his pulse, turning a routine return mission into a claustrophobic fight for survival. The narrative blends hard‑science details with psychological tension, asking what happens when humanity’s first step onto another world brings an invisible threat back home.
Language
en
Duration
~24 minutes (23K characters)
Publisher of text edition
Project Gutenberg
Credits
Produced by Greg Weeks, Mary Meehan and the Online Distributed Proofreading Team at http://www.pgdp.net
Release date
2016-02-10
Rights
Public domain in the USA.

1915–1993
A lively early voice in American science fiction, he helped shape the genre both as a writer of fast-moving stories and as an influential editor. His work ranged from robot tales and juvenile adventures to the books that helped define Del Rey’s publishing legacy.
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