NIGHTSIDE ON CALLISTO Linda Nagata A faint, steady vibration carried through the igloo’s massive ice walls—a vibration that shouldn’t have been there. Jayne heard it in her sleep. Age had not dulled her soldier’s reflexes, honed by decades spent on watch against incursions of the Red. Her eyes snapped open. She held her breath. The vibration hummed in the walls, in the bed frame, in the mattress, perceivable even over Carly’s raspy breathing.
Jayne reminded herself that the Red was far, far away, its existence bound to Earth, where it bled through every aspect of life—a relentless tide of information and influence shepherding the thoughts and actions of billions along paths determined by its unknowable goals. Whether the Red was alive, or aware, Jayne couldn’t say, and she had no opinion either on its virtue. She only wanted to keep it out of the Shell Cities. Most of her life had gone to the long defense of their growing union, an association of scattered orbital habitats determined to stay free of the Red. But in retirement, Jayne had found new opportunities.
Less than twenty-four hours ago, her team of four had touched down on Callisto, Jupiter’s outermost Galilean moon and the only one that lay beyond the gas giant’s killing radiation belts. A raft of construction equipment had preceded them, including a gang of ten small mechs that had assembled a sprawling igloo in time for them to move in. It was the team’s task to establish a prototype ice-mining station to supply the expansion of the Shell Cities.
Maybe the vibration was generated by some new construction activity at the launch rail? Probably that was it. But “probably” never was a sufficient explanation. Jayne slipped out from under the shared blanket, careful not to wake Carly, who’d crawled into bed just an hour ago. Each team member worked a staggered, twelve-hour shift. Jayne had taken the first rotation, and her night was almost through.
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