It's a law of nature, which I don't understand too well, that we can cool things as close to Absolute Zero as we want to, but we can never get all the way there.
I think that individual atoms and molecules have been cooled in the laboratory to within a few thousandths of a Celsius degree of it ... actually not too shabby an accomplishment ! ____________________________________
WOW ! I just went and searched online for more information on this subject. (You can't imagine what great stuff you can find by doing that. You ought to try it some time.)
The 1997 Nobel Prize in Physics was awarded to a team of three physicists who invented a method of using lasers to slow down the motion of atoms, and that's the same thing as cooling them. They were able to cool some atoms to a temperature of 240 millionths of a degree above Absolute Zero !
