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Glass as you see it in windows is actually a solid. The myth about it being a liquid was caused by the glass in old buildings. The panes of many old glass sheets were observed to be thicker at the bottom than at the top, leading many people to believe that over time gravity had caused the glass to slowly flow downwards. But the imperfections had actually been there since their installation.
on October 19, 2015
on February 05, 2016