Unlike stony corals and other anthozoa, whose polyps have sixfold symmetry, the polyps of a gorgonian have eightfold symmetry.

The Wards are open-topped, with skyscrapers rising from the superstructure. Towers are sealed against vacuum, as the breathable atmosphere envelope is only maintained to a height of about seven meters. The atmosphere is contained by the centrifugal force of rotation and a membrane of dense, colorless sulphur hexafluoride gas, held in place by carefully managed mass effect fields.

And dicing Time for gladness casts a moan....

They also recorded the distance of each child’s home from the nearest limited-access highway and from other major nonfreeway roads.