Bottom Dead Center

Well, here it is, the winter solstice, shortest day of the year, the Yule (a word that may have come from the Old Norse for wheel, or not). Didn't do much today, went to a "solstice party" last night and slept in this morning; meantime, car is back in shop (the part I was waiting for came in), so I spent the day geeking out with biomathematical models. Ring out, solstice bells!