As climate change and growing energy demands strain global systems, scientists are increasingly turning to passive cooling technologies—ways to cool objects or spaces without using electricity. One promising method is radiative cooling, which works by reflecting sunlight and releasing heat in the form of infrared radiation into space. But despite its potential, this method is limited by natural laws that cap how much heat can be emitted. Now, a proposed theoretical model has the potential to boost the power of radiative cooling, potentially changing the way we manage heat in a warming world.