I just found out, from one former student, that another former student has died. Shannon was a wonderful person, a great scientist, and someone who worked hard to balance all those things in life that one needs. She was bright, in her mind and her spirit. Here's a picture from a long ago Christmas party. She was generous, and I still have one of the mugs she gave to all of us in the lab that year.
One should live one's life without regrets: do the things now that you might regret later. And don't regret the things you did (or didn't do) then. This is one more regret that I will carry: that I had not spoken with her for a few years.