The software isn't bad--in fact, you could argue it's the hot-selling Macintosh computer's secret weapon--but no one was gasping in awe as Schiller showed off the ability to add a stone texture to bar charts in Numbers, Apple's spreadsheet software.

FORBES: Macworld '09

The mineral composition of each of the Canyon's 15 dominant layers influences the stone's color, type and texture a variety that is all the more evident on the side-canyon detours.

WSJ: The Grand Canyon's Secret Network

Grit-blasting usually takes off original texture and detail as well as grime which often, funnily enough, protects the stone underneath.

ECONOMIST: Conservation