This is a GIF of how nanoporous polyethylene reflects visible sunlight, but allow heat to escape. Such material could be used to create clothes that help keep people cool. This material relates to a paper that appeared in the Sept. 2, 2016 issue of Science, published by AAAS. The paper, by P.-C. Hsu at Stanford University in Stanford, CA, and colleagues was titled, "Radiative human body cooling by nanoporous polyethylene textile."
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