In article , Jeff Wisnia says...

I asked the guys on the sci.physics newsgroup why it happened that way
and their concensus had something to do with saturation pressure of CO2
at different temperatures and the fact that when placed in the freezer
the contents freeze "from the outside in" but when it's removed they
start melting "from the outside in".

If you want to see some excitement, immerse an *open* can of
coke in liquid nitrogen.

Don't be looking down at the top of it when doing so however.

Jim


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