It would have been my father's 80th birthday today - en.wikipedia.org/wiki/Gordon_K_MacLeod (b. January 30, 1929). He died on November 25, 2007 in hospice in Pittsburgh, Pennsylvania, having sustained a concussion on Semester at Sea on December 30, 2004, which led to two subdural hematomas.
Here's a video from his memorial service on Cuttyhunk Island, Massachusetts from August 2, 2008 - scottmacleod.com/family.htm. I miss him.
As a medical doctor and a professor, he was very free-thinking, and able to realize fascinating things in life.