Cheesegraters and Crystals

It led me to Apple’s page on the design of the Pro and this language:

The lattice pattern on Mac Pro is based on a naturally occurring phenomenon in molecular crystal structures. In materials science books, the hcp crystal structure, in which atoms arrange themselves like the spheres we’ve been looking at, is usually shown in an oblique view, like in the drawing at the lower right. The fcc structure isn’t as obvious because it’s harder to visualize cubic arrangements in our layers of balls.

Source: leancrew.com