
Here is a bit more information on why they think this might be possible and it comes down to the molecular structure:
So what is it about glass that makes people think it’s a liquid? It all comes down to its atoms, which aren’t arranged in a nice crystalline structure like they are in most solids. Instead, they’re all jumbled up, which you’d usually see in the structure of a liquid.
But glass is a special type of solid, called an amorphous solid, which means that it cools down so quickly from a liquid state that its molecules don’t have time to arrange themselves properly.
Which one is it? Feel free to comment with your theories!
thanks to sciencealert for the great info

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Why does it melt during earthquakes?
Its actually a semisolid
Now frozen as windows.
Vinyl falls into roughly the same category.
Yes how do you think they make it.
In France the old churches, the stained glass is thicker at the bottom. An interesting phenomena
its a fluid
not a phenomenon.. it’s considered a supercooled liquid, in a semi-solid state 😉