Is Glass a Liquid? 

There are a lot of sciencey factoids floating around the world that are actually wrong. I'd give a litany of examples, but hey, I literally wrote the book on some. One of the most tenacious is the idea that glass is actually a liquid. The usual claim is that the glass in very old windows in European buildings is thicker at the bottom than at the top due to the very slow flow of the liquid glass. But that's wrong. Glass isn't a liquid; it's an amorphous solid and doesn't flow. The reason the glas...