Changchun Institute of Optics Fine Mechanics and Physics

(a) Schematic diagram of the radiative heat exchange among the atmosphere, the outer space, and the surfaces. (b) Measured absorptivity / emissivity. (c) Real-time temperature in thermal test. (d) Calculated annual energy-saving for anti-condensation of 10 cities in various climate zones. CREDIT by Yining Zhu, Yiwei Zhou, Bing Qin, Rui Qin, Min Qiu, and Qiang Li

The possibilities are promising for night-time radiative warming using the atmosphere

How about a metal that won’t sink in water no matter what? Could this lead to an unsinkable ship?