I was thinking about icicles today. My first split inclination was that at one moment when the temperature drops, a tendril freezes in mid air. Then I realized the absurdity of that, even though if that were true it would be pretty spectacular. I then worked the obvious out in my brain. A drop, the tiniest drop freezes. Then another on top of that. Then another. Until this one drop is covered and created by millions of drops, until the temperature really does freeze all the moisture.