Every year since 1990, I have made a holiday card sending it to friends and family (a list of ~ 50). They have always been nerdy. I try and feature something about the physics I figured out in the year. This one is less upbeat than those in the past, but there is a reason for that ;-)
No math, no snarky puzzle.
Next Monday/Tuesday, Dec 26, a vacation week.
Monday/Tuesday, Jan. 2/3: Spinning the Interaction Story: Attracting and Repelling.