A continuous space-time cellular automata by Bert Wang-Chak Chan.
Winner of Virtual Creatures Contest, GECCO 2018.
Online demo: https://chakazul.github.io/Lenia/JavaScript/Lenia
Code: https://github.com/Chakazul/Lenia
Paper: https://arxiv.org/abs/1812.05433
Figure from above paper showing visual similarity of real biological and artificial mathematical life forms: