<!-- BEGIN ADAPTIVE EMBED CODE --> <script src="https://cdn-v2.mediagraph.com/video-js/3.0/_adaptivem.js" data-player="" data-placement="H-3v1Iy7XX7u1T53"> </script> <!-- END ADAPTIVE EMBED CODE --> Researchers at Tufts University have developed a solution made from silk that can coat produce and keep it fresh for a week without the need for a refrigerator.
