There were no windows in the Brin 2 facility—rotation meant that “outside” was always “down,” underfoot, out of mind. The wall screens told a pleasant fiction, a composite view of the world below that ignored their constant spin, showing the planet as hanging stationary-still off in space: the green marble to match the blue marble of home, twenty light years away. Earth had been green, in her day, though her colours had faded since. Perhaps never as green as this beautifully crafted world though, where even the oceans glittered emerald with the phytoplankton maintaining the oxygen balance within its atmosphere. How delicate and many-sided was the task of building a living monument that would remain stable for geological ages to come.