Modern approaches, as demonstrated everywhere from California supermarket rooftops to Japan’s Expo 2025 pavilion, go even further. Normally, if the sun is up and pumping in heat, surfaces can’t get cooler than the ambient temperature. But back in 2014, Raman and his colleagues achieved radiative cooling in the daytime. They customized photonic films to absorb and then radiate heat at infrared wavelengths between eight and 13 micrometers—a range of electromagnetic wavelengths called an…

![[CITYPNG.COM]White Google Play PlayStore Logo – 1500×1500](https://startupnews.fyi/wp-content/uploads/2025/08/CITYPNG.COMWhite-Google-Play-PlayStore-Logo-1500x1500-1-630x630.png)