We know in the field of aging that some people tend to senesce, or grow older, more rapidly than others, and some more slowly.

Our concepts of aging really should be blurring because there are plenty of people who make it to older ages who aren't really any different in many ways than people who are decades younger.

Some people are more terrorist than others.

You can open up a centenarian's brain, and you'll see some areas that look like that of a 50-year-old or of a 110-year-old. You can have variation in the basic process of aging, called senescence, in different parts of the same body.

Some people hide more than others, and it does intrigue me.

What we know for sure from our work and from others' is that mice have a life span of 1,000 days, dogs have 5,000 days, and we humans have 29,000 days. Recognizing that the duration is limited, and aging is inevitable, focus the attention on enhancing the quality of the days you have.