Glass - a Supremely Viscous Liquid or a Solid?
When I was in secondary school, we were told glass is a liquid. It seems antique windows are thicker at the edge than in the middle.
But if you think with a clear mind for a moment, if the glass panes used in windows was actually a liquid, shouldn't it be thicker at the bottom and thinner at the center, but also thinner at the sides because a number of panes were cut from one sheet? How is that? Because the glass sheet was spun for thinness.
It is now known and accepted that glass actually is not a super-cooled liquid, but a true solid. This fact is but one of many facts that counter some of the teachings we received in school, quite dogmatically.
One of the ones I most often think of is the quaint notion that oil comes from rotting dinosaur carcasses plus organic matter, such as plants and leaves.
Image Credit » https://pixabay.com/en/shutters-caribbean-architecture-669296/ by psaudio