Gold foam, wired roses, 3-D art for the blind and a beautiful way to recycle plastic garbage are highlights from this week's Tasty Tech gallery.
Above: Scientists have created an incredibly lightweight gold by mixing milk protein fibers with a solution of gold salt. The fibers formed a kind of lattice to which the gold salt crystalized to. The resulting gold foam is 98 parts air and only two parts of solid material, but in total is 20-carat gold. Developer Raffaele Mezzenga, professor of food and soft materials at ETH Zurich, said the material could be used in jewelry, as a chemical catalysis and in applications where light is absorbed or reflected.