Dark Canvas-Tidbits

I always like to sneak in tidbits of unusual info into my books. Though it would pprobably fall under the heading of useless trvia, I enjoy it. For instance; In Dark Canvas I mention that glass is a liquid. It runs like water, only slower. In old old houses you can easlily measure the thickness of the glass at the top and bottom of the window pane to gauge the different thicknesses.