Qi Zhang

Usually heat transfers from hot to cold. But in the quantum world, an uncertain order of interactions can reverse this flow. Scientists have created a device that simultaneously cools and performs work, pushing the boundaries of thermodynamics and paving the way for new quantum technologies.

Instead of quickly fading glowing markers, scientists used magnetic nanoparticles and diamond sensors. This 'compass' picks up magnetic signals from cells without interference, making it possible to observe even weak processes in a single living cell. This opens new possibilities for diagnostics and