Aging

Age is such an elastic concept: I know of an 81-year old man who works on his property, chopping his own wood; my parents are in their late 70s, and not slowing down; there was an article recently about a man who finally retired at 100 years of age.
What is strange is that I still hold onto my notions of old age, though all around me I see people who dispel that myth. More and more, we have models of healthy and vigorous people over 70 and this is still amazing to my feeble mind… Old myths die hard.