The good folks over at Green House Good Life posted about Superwindow, a window with an R of 38. No, that's not a typo: that's 3 freakin' 8! Those crazy Poles made a window with two panes 'o glass sandwiched with 10 layers of film (or microfilm glass according to a commenter) and a dollop or two of aerogel (the engineers describe it differently...). We're lucky to get windows with an R of 2 or 3 these days, so these things could be world-changing (I'm serious!) if they can be economically produced (a big if...).
Look! It's a bird! It's a plane! It's SUPERWINDOWS!!!