For generations, the inner life of glassy materials remained largely beyond the reach of deliberate design — their disordered atomic structure offered no obvious handles for engineers to turn. A new class of materials called nanoglasses is changing that, by introducing intentional glass-glass interfaces that behave as a distinct architectural phase, enabling atomic diffusion thousands of times faster than ordinary glass and opening systematic control over mechanical, magnetic, and catalytic behavior. The work, synthesized in a recent perspective in the Beilstein Journal of Nanotechnology, mark