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Comment Re:If you squeeze glass it flows (Score 2, Insightful) 185

My Materials class in 1972 was very clear, Glass at normal temperatures can be classified as a liquid. ergo, over time it moves. This Medieval glass is considerably thicker at the bottom than the top.

Talk about the bleeding obvious........... sigh.

This Medieval glass is thicker at the bottom because of its fabrication process. Theoretically it should indeed "flow", but the relaxation time is just way too long for it to become noticeable in a matter of centuries...

Source : 2008 polymer class / http://en.wikipedia.org/wiki/Glass#Behavior_of_antique_glass

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