Polymath257 is probably right--he is a physicist, after all, so this is within his area of expertise. But that's an appeal to authority, of course, and could be wrong. Consider, though, what happens to the ice cubes in your freezer if you leave them there for a long time without using them--they get smaller and eventually disappear altogether, evaporating in the cold and dark because of that molecular motion, which does not come from light energy and slows only as the temperature of the ice approaches absolute zero.<quoted text>
Perhaps the motion of the molecules is caused by the absorption of light energy?
I've posted before about watching frost on windshields on frozen mornings evaporate before direct sunlight hits them. The sun was just coming up and still behind the mountains. A mile high and low humidity. Scattering from the atmosphere. Low level intensity. This sets up a current, resulting in that lowest temperature of the day after sunrise phenomenon, caused by the Peltier-Seebeck effect.
EM, son, it's all about the EM. Motion.
Could have sworn the BBT is based upon a superhot and superdense something or other suddenly expanding and then separating, then creating individual forms from condensing.
Boil water. Melt some gold. Melt some platinum. Let the vapor encounter an outside force and see if they condense differently. Or something like that.
I think. I'm sure Poymath will correct me if I'm wrong.