Researchers have found a way to describe “crowd hydrodynamics” that doesn’t assume the behaviours of the crowd itself: The physicists focused on cohorts of runners at the beginning of a marathon, as they are guided to the starting line by a row of organizers in successive sequences of walking and halting. This protocol creates a periodic and controlled disturbance similar to the stimulations that are typically used to probe the mechanical response of fluids.

Rest of World examined a new study that revealed the hidden network of African workers powering AI: Firms that provide outsourced digital labor for big tech companies tend to be secretive. They are often bound by legal contracts that limit what they can say, allowing tech companies to distance themselves legally and ethically from their workers, experts told Rest of World.

A study by US and Indian researchers has found new behaviours in Floquet Majorana fermions and how they can improve quantum computing: these findings provide researchers worldwide with a roadmap for detecting and exploring new, controllable properties in driven quantum systems.