@Michael McKelvey posted:Isn't glass actually a liquid?
I had heard that it was (and once believed it), but it is really an amorphous solid - an in-between state between true solid and true liquid.
The idea that glass is a true liquid comes from old window panes that were thicker at the bottom than at the top, making people think that the glass had 'melted'. But, the reality is that old window makers simply put the thicker part of a pane toward the bottom of the panel. Old glass was never perfectly made, and one side/end could be thicker than another.
The things you learn when you get into restoring a 160 year old stone house...