An intruiging tessellation from a dog with a way with words
Cover image on Grünbaum/Shephard book: Tilings and Patterns
Also a variety of tessellations from MC Escher.
And while we are on tessellations, here is an animated tadpole tessellation posted by the dog’s father (who, strangely, does not seem to be a dog).
Newton Excel Bach, not (just) an Excel Blog 