Below is a picture of a recently deceased tree. It was cut so the tree rings are fairly visible. After meticulously counting, I found there to be about 66 rings, which would account for 66 years of life. The outer layer of bark does not count for a tree ring. I have dotted the tree in several places and connected them with significant dates in history in the last 66 years.
red 2004- start of google
black 1992- year I was born
Green 1991- fall of soviet union
Pink 1972- water gate scandal
blue- MLK assasination