Physical Worlds

Physical simulations, from flowing fluids to self-assembling parts, are how engineers test ideas before building them. They are also slow, which is why fast stand-ins for them, such as neural networks trained on their output, are spreading.

These experiments run real physics in your browser and ask research questions about it: when a fast stand-in can be trusted, what it costs to find out, and how to steer a fluid that drives itself, and a swarm that all feels the same push.