[mchouza]

There are some places in the "natural universe" that are colder than the CMB. That's because they aren't in equilibrium:

http://en.wikipedia.org/wiki/Absolute_zero#Very_low_temperat...

[andrewcooke]

thanks, i was wondering if there was something like that, but couldn't imagine how it would work (i deleted my other answer earlier because it seemed to all be getting a bit unpleasant; i still think that sentence from the article is pretty inoffensive).