← Explore all worldsRabbit Run One rabbit, one fox. Follow a lineage of mutated descendants as better escape traits are saved across repeatable chases. Enable JavaScript in a browser with WebGL 2 to run this interactive simulation.One rabbit tries to escape one fox. Then the computer tries a new rabbit! Speed helps the rabbit run, awareness helps it notice the fox, and agility helps it turn. All of these use energy.Each new rabbit gets small random changes from the best rabbit so far. The computer keeps a new version only if it does better.When the rabbit escapes, the fox stops for a few moments while the rabbit keeps going. The changes happen between tries, not while a rabbit is running. Try this: Watch at 1× to spot an escape, then speed up time to compare lots of tries. This is a simplified experiment with inherited abilities. Explore related worldsAdaptationWildwoodMurmuration