There was no agency in this, only a blind acquisitiveness. The Hypotheticals evolved in ways that maximized their exploitation of sentient organisms. Early in the history of the galaxy, an organic civilization had constructed twin Arches in order to colonize the marginally habitable planet of a neighboring star—the species suffered decline and extinction soon after, but its technology was analyzed and adopted by the Hypotheticals. In the same way the Hypotheticals had learned to extract energy from stellar cores and gravity gradients, to manipulate atomic and molecular bonds, to order and stabilize the exchange of information over distances of hundreds of light years. Eventually the Hypotheticals had developed a means of extending the useful life of such species. If a fecund mother planet was suspended inside a temporal distortion while a system of Arches was put in place—as the Earth had been suspended during the Spin—that planet’s resource base could be expanded tenfold; its organic civilization would spill into new worlds and flourish on them, cycling through epochs of decline and expansion, reliably generating new and exploitable technologies.

Such organic species remained mortal and eventually died, of course. All biological species did. But the harvest of ruins increased exponentially.

*   *   *

Allison and Turk arrived at Vox Core in the storms that followed the collapse of the Arch and the dismantling of the systems that had for so many years protected Earth from its ancient, dying sun.

I welcomed them back and explained what had happened. I told them I could defend them even from the destruction of this superannuated planet—I had grown that powerful, and in a very short span of time.

But they were shocked by the deaths that had taken place. For days they wandered the empty corridors of the city. The rooms they once shared had been carved away in the initial attack of the disassemblers; they could have chosen any of tens of thousands of abandoned suites and rooms in which to make a home, but Allison told me she was unnerved by everything the dead had left behind them … the unsorted possessions, the place settings abandoned on tables, the nurseries without children. The city was full of ghosts, she said.

So I built them a new residence in a forested tier deep to starboard, using the city’s fleet of robotic constructors. I chose a location far from the public corridors, accessible by footpath. The tier’s artificial sunlight was bright and convincing, its ambient temperature consistently pleasant, its average humidity low. The recycling system stirred up gentle breezes every morning and evening, and rain fell every fifth day.

They agreed to live there until they found a better home.

*   *   *

I believed there might be a better home for them, though not on Vox, and certainly not on Earth. But most of my attention was occupied with the business of keeping Vox Core intact in an increasingly harsh environment.