# Glass movement

**URL:** <https://boards.straightdope.com/t/glass-movement/35554>\
**Category:** Factual Questions\
**Created:** [October 4, 2000, 12:45am UTC](https://boards.straightdope.com/t/glass-movement/35554 "2000-10-04T00:45:06Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![insider](https://avatars.discourse-cdn.com/v4/letter/i/bbe5ce/32.png) [@insider](https://boards.straightdope.com/u/insider)\
**Post date:** [October 4, 2000, 12:45am UTC](https://boards.straightdope.com/t/glass-movement/35554/1 "2000-10-04T00:45:06Z")

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I understand that glass is actually a liquid. How long would it take, on average, to see a noticible thickening in the bottom portion of a pane of glass?

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**Author:** ![Avumede](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/avumede/32/7235_2.png) [@Avumede](https://boards.straightdope.com/u/Avumede)\
**Post date:** [October 4, 2000, 12:50am UTC](https://boards.straightdope.com/t/glass-movement/35554/2 "2000-10-04T00:50:53Z")

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Quick answer: You will never see any effects of flowing glass in your lifetime. Probably you wouldn’t even see much in the lifetime of the universe. For more info, so a search. This has been covered in abundance, both on the board and by Cecil himself.

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**Author:** ![tomndebb](https://avatars.discourse-cdn.com/v4/letter/t/b9e5f3/32.png) [@tomndebb](https://boards.straightdope.com/u/tomndebb)\
**Post date:** [October 4, 2000, 4:07am UTC](https://boards.straightdope.com/t/glass-movement/35554/3 "2000-10-04T04:07:10Z")

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Cecil:

[How come you can see through glass?](http://www.straightdope.com/classics/a1_120.html)

[What’s equus eroticus all about? Plus: is glass a liquid or a solid?](http://www.straightdope.com/columns/000211.html)

Cecil’s underpaid minions:

[Why won’t two pieces of glass slide against one another?](http://www.straightdope.com/mailbag/mglass.html)

The Teeming Millions:

[Supercooled Liquid](http://boards.straightdope.com/sdmb/showthread.php?threadid=1190)

[Glass not a liquid?](http://boards.straightdope.com/sdmb/showthread.php?threadid=1904)

[glass is liquid, david is wrong](http://boards.straightdope.com/sdmb/showthread.php?threadid=2192)

[glass vs. crystal](http://boards.straightdope.com/sdmb/showthread.php?threadid=5982)  
And I think there was at least one more, but it appears to have been archived and lost in the UBB ==\> vBB migration.