credit: Stephen Morris, The Experimental Nonlinear Group, Dept. of Physics, University of Toronto; image source; larger image
Ripples on Icicles
Notice the characteristic ripples on the icicle--see Ripples on Icicles for videos showing how these ripples form. Visit Geomefreeze to find out more about icicles. To learn about the physics of freezing and melting water, see the Hyperphysics page Phase Changes.
(This feature was updated on July 17, 2013.)
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Visit Ice Spikes to find out how to grow ice spikes in your freezer. To see what an ice spike looks like, check out this photo from SnowCrystals.com.
(This feature was updated on February 28, 2012.)