Let the sun shine in (while keeping the heat out)

You shouldn't have to forego sunlight and views to keep your house cool. Researchers at the University of Liverpool have developed a glass coating that allows visible spectrum and low-temperature infrared light to pass through. But if the temperature goes above 29 degrees Celsius, the glass reflects the infrared radiation. According to Scientific American, the coating, consisting of vanadium dioxide with a pinch of tungsten, "currently has a somewhat unattractive yellowy brown color, which the researchers hope to be able to remove with future refinements." Link