Scientists used advanced X-ray technology to peek into the atomic structure of a super-strong magnet called Nd2Fe14B, which is used in everything from wind turbines to electric cars. Despite the material being extremely difficult to analyze because it contains many heavy atoms, researchers successfully mapped out how electrons are distributed and how atoms bond together. They discovered that iron atoms form a complex 3D network that is crucial for creating the magnet’s exceptional strength, with one particular iron atom (Fe2) being essential for connecting the different layers.