Here is a recent illustration I did for Intelligent Life
about quasicrystals. The AD was the ever awesome Martin Lovelock. Do you know what they are? I didn't! According to Wikipedia:
"A quasiperiodic crystal, or, in short, quasicrystal, is a structure that is ordered but not periodic. A quasicrystalline pattern can continuously fill all available space, but it lacks translational symmetry. While crystals, according to the classical crystallographic restriction theorem, can possess only two, three, four, and six-fold rotational symmetries, the Bragg diffraction pattern of quasicrystals shows sharp peaks with other symmetry orders, for instance five-fold."
Not only that, they're really beautiful patterns. I'd like to use more of them in my work, I think I just may.