1) DarwinBots is an artificial life simulator that models the evolution of software organisms ("bots") through adaptation and natural selection. Bots live in a flat, non-discrete space and consume other bots for energy to power their actions. 2) Bots have DNA that determines their behavior and can mutate as they reproduce, allowing for open-ended evolution over many generations. Their behavior and interactions are studied to understand evolutionary processes. 3) The simulation allows for unlimited variation as bots' DNA acts as a full program, unlike other simulations with limited properties. Success requires long runs, as with real evolution, though it models key aspects like movement, energy use, and reproduction.