If you mix cornstarch and water in the right proportions, you get “oobleck”: something that seems not-quite-liquid but also not-quite-solid. Oobleck flows and settles like a liquid when untouched, but ...

For over a century, mathematicians and physicists have wrestled with the chaotic nature of fluid movement — how air whirls around airplane wings or water churns in a pipe. Google's DeepMind lab ...