# Vertical Protrusions on Ice Cubes?

**URL:** <https://boards.straightdope.com/t/vertical-protrusions-on-ice-cubes/658371>\
**Category:** Factual Questions\
**Created:** [May 15, 2013, 2:41am UTC](https://boards.straightdope.com/t/vertical-protrusions-on-ice-cubes/658371 "2013-05-15T02:41:21Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![hiitsmeamelie](https://avatars.discourse-cdn.com/v4/letter/h/8491ac/32.png) [@hiitsmeamelie](https://boards.straightdope.com/u/hiitsmeamelie)\
**Post date:** [May 15, 2013, 2:41am UTC](https://boards.straightdope.com/t/vertical-protrusions-on-ice-cubes/658371/1 "2013-05-15T02:41:21Z")

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How do vertical protrusions form on ice cubes as they freeze?

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**Author:** ![Dewey\_Finn](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/dewey_finn/32/4222_2.png) [@Dewey\_Finn](https://boards.straightdope.com/u/Dewey_Finn)\
**Post date:** [May 15, 2013, 2:46am UTC](https://boards.straightdope.com/t/vertical-protrusions-on-ice-cubes/658371/2 "2013-05-15T02:46:27Z")

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[Previous thread](http://boards.straightdope.com/sdmb/showthread.php?t=608206) on the subject with a link to [this webpage](http://www.its.caltech.edu/~atomic/snowcrystals/icespikes/icespikes.htm) explaining the phenomena.