This series explores the possibilities opened by crossing forms of knowledge. Imagine a magic staircase that goes on forever, each step reduced by half as you shrink to half your size. The steps form an image of infinity - a Geometric Progression: a; aR; aRsq; . . .(R<1), a structure where a wonderland of past and future worlds can open out from the flights of stairs - from a journey through a labyrinth to a voyage on a ship to . . .