Glass: solid or liquid?

Friday 22 August 2003 — This is more than 21 years old. Be careful.

We’ve all heard that glass is a liquid, not a solid, appearances notwithstanding. We’ve been told that in fact, glass is glacially flowing all the time, and that old window panes are thicker at the bottom than at the top because of centuries of flow.

Well it’s all wrong.

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