This is a watercolor painting by Margaret Nelson, inspired by an illustration of a Belousov-Zhabotinsky reaction also created by Margaret Nelson for Steven Strogatz for his book "SYNC: The Emerging Science of Spontaneous Order."
Poster announcing the 2018 American Physical Society March meeting. Image inspired by a Belousov-Zhabotinsky pattern from S. Weiss and R. Deegan, Phys. Rev. E 95, 022215 (2017).