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Friday, February 23, 2007

Fact or Fiction: Does Glass Flow?

I can't remember who I was discussing this with recently, but I think it was Joe, so this post's for you Joe. If glass is actually a liquid, are ancient windows thicker at the bottom than at the top because the glass has flowed downwards? Fortunately, Scientific American has just answered this question. You can read the full answer here, but if you want the short version: yes and no. Glass does flow, but it would take longer than the universe has existed for windows to get thicker at the bottom. If you want to know how that happened, you'll have to read the Scientific American article!

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