---- Tom Hargrave <thargrav@hiwaay.net> wrote: 

> And BTW, freezing pure ethylene-glycol does not expand when it freezes, it contracts. It can still break things but now it’s pressure from the outside pushing in.

From what I know, water is the only substance that occupies more space upon freezing than it does as a liquid.  It's greatest density is at 4 C, so it expands at temperatures higher and lower than that.  This physical fact creates some interesting phenomena in nature beyond ice forming at the surface of a body of water.

mcneely