Crystal math

Not long ago, I thought flocked Christmas trees were meant to simulate snow on branches. (Just yesterday, to be truthful.) Today I know more precisely: it's hoarfrost, because today it's all around.

These are not Moscow trees, only their cousins somewhere.

Only a little frost lit on the grass this morning, but the trees were thick with it, and a cold fog blurred the town below us as I walked the campus. When I emerged from my math final (triumphant :), the trees were even whiter than before. What do you know? I've seen ice storms settle on trees, glorious and destructive, but not this. Oregon's fogs are cuddly compared to this winter's-breath.
 

Did I mention I like it here?