monkeysim — a living evolution sandbox

Environment

The world your colony has to survive in.

Food / sec 160

Food clustering 0

Predator pressure 0

Simulation

Speed 1×

Mutation rate 0.040

Fast-forward 25 yr

Restart as species

View

Color monkeys by

♂ male ♀ female child
white ring = pregnant · pink halo = fertile · red ring = bully

⏩ fast-forwarding

Gene pool

Sort genes by

Click any gene to expand what it does — and the exact rules it governs.

How the gene pool has changed

Welcome to the colony

A troop of monkeys — each carrying ~50 genes — lives, fights, and breeds in real time. No one's in charge: you shape the environment, and natural selection rewrites the gene pool over generations.

▶
It's already alive. Every dot is a monkey — ♂ blue, ♀ pink, yellow children.
🌍
Left: reshape the world — food, clustering, predators.
🧬
Right: watch the genes evolve. Click any gene (or a group title) to learn what it does.
⏩
Skip ahead to fast-forward centuries in seconds and see where evolution lands.

white ring = pregnant · pink halo = fertile · red ring = a bully the troop gangs up on

Start the colony as…