Stegosaurus Tiling

John Chase, the head of the Walter Johnson High School Math Department, in Maryland, near Washington DC, liked my Stegosaurus variation of the Spectre monotile so much that he had his students paint it on the wall of their math office! Attached are a couple of photos he shared.

Smith, Myers, Kaplan, and Goodman-Strauss recently discovered an infinite continuum of aperiodic monotiles, of which the stegosaurus is a specially simple equilateral example with only ±60° and ±90° turns (and a single 0° turn).