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In the mid-21st century, time travel is used to send political prisoners to Hawksbill Station, a prison camp in the late Cambrian Era. When the latest arrival suspiciously deflects questions about his crimes and knowledge of 'Up Front', the inmates decide to find out his secret. [NOTE: a novella length version of this story is also available.] Hugo Award Nominee, Nebula Award® Nominee
Genre: Science Fiction
Genre: Science Fiction
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Used availability for Robert Silverberg's Hawksbill Station