Personally, I think all of this upgraded, feel-good language is a further sign of America's increasing uncertainty about itself.

Hyperbolic geometry provides each line with two points at infinity. Whether there is a piece of the line beyond the points at infinity, completing the piece lying in the finite to a closed curve, we cannot say, since we cannot move as far as the points at infinity, let alone beyond them.

The step-by-step directions walked me through the assembly, but identifying the parts was still hard.

By describing him as a “Scythian shepherd,” Marlowe seizes the idea of the near contemporary Mongolians in the relatively unracialized image of the classical Scythians (who were neither Central Asiatics nor “shepherds,” though they were nomads).