A One-Page Definition of Life

1. Artificial Life Forms generated by a computer program 2. Tom Ray's Tierra Artificial Life and World -less graphical but no less revealing 3. Conway's Game of Life-cellular automata, Life created on a Grid A ONE-PAGE DEFINITION OF LIFE Prologue Until a few decades ago, most people thought they knew what it meant to say that something was alive. Breathing, eating, the ability to reproduce, having a shape, existing in a time-space dimension etc were some of the characteristics which defined Life. Until the advent of computers and programmers who wrote code that could also perform most of the things which living things do. And that has led people [like me] to re-evaluate the meaning of saying that you are a living thing. It was John von Neumann, who first thought of self-reproducing cellular automata, and inspired John Conway, Chris Langton, Tom Ray, and Stephen Wolfram, John Holland and countless others to institute the study and creation of entities that exhibited life-like be...