Living World — an ecosystem where every animal has its own brain

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drag to pan · pinch to zoom · tap any animal to open its brain

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slide to unlock

Biome

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Population

Each line is a species over time watch the herbivores boom on fresh grass, the predators rise behind them, then both fall. Real Lotka-Volterra cycles, emergent.

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Hunger

Thirst

Fatigue

Fear

Mating

Injury

This is one animal's live state. It weighs these drives every moment and does the most urgent thing no script tells it where to go.

Simulation

Speed1×

Every creature runs a small utility-AI brain over continuous needs; the food web (sun → plants → grazers → predators → carcasses → soil) is modelled end to end, so populations rise and crash on their own. One engine, many biomes it's all data. Hand-written for this repo self-contained, no dependencies.