I believe weregiraffe is referring to this[1][2]. Conway's Game of Life is a 2D "world" with 4 rules that define the "physics" in that world, and someone made a

I believe weregiraffe is referring to this[1][2]. Conway's Game of Life is a 2D "world" with 4 rules that define the "physics" in that world, and someone made a Turing Machine in it. [1] https://www.ics.uci.edu/~welling/teaching/271fall09/Turing-Machine-Life.pdf https://www.ics.uci.edu/~welling/teaching/271fall09/Turing-M... [2] http://www.rendell-attic.org/gol/tm.htm http://www.rendell-attic.org/gol/tm.htm