Cold, dark space to keep us cool in future?

Researchers in the US have developed a material that might offer a way of keeping buildings cooler, while also using space as a handy heat sink. In tests, a structure beneath this new material was kept almost 5°C cooler inside compared to the external temperature – with no need for power unlike conventional air-conditioning. Further development might mean new ways in future to provide cooling in areas where there is no ready access to electricity.