...and to use the Sun's heat to cool off an object. What if we could use the cold darkness of outer space to cool buildings on earth? In this mind-blowing talk, physicist Aaswath Raman details the technology he's developing to harness "night-sky cooling" -- a natural phenomenon where infrared light escapes earth and heads to space, carrying heat along with it -- which could dramatically reduce the energy used by our cooling systems (and the pollution they cause). Learn more about how this approach could lead us towards a future where we intelligently tap into the energy of the universe. https://en.wikipedia.org/wiki/Radiative_cooling https://raman.seas.upenn.edu/ At the Raman lab, we seek to understand how light and heat interact with nanoscale photonic devices and materials, with the goal of enabling new energy and information technologies. In particular, we are motivated by the possibility of enabling fundamentally new technological possibilities for next-generation approaches to renewable energy, information processing, sensing, displays and communication systems. Led by Prof. Aaswath Raman, our research interests span a range of topics, including metamaterials, nanophotonics, photovoltaics, computational methods, machine learning and energy systems. Developments in these fields have allowed us to control light-matter interaction in new and extraordinary ways that we’ve just scratched the surface of. They are thus vital and important frontiers of scientific inquiry with the potential for near-term impact in how we deal with a remarkably broad array of sectors in our economy.