Aging: Life Is a verb, not a noun
Getting older is inevitable, growing up less so. Ask my wife; she will tell you immediately that growing up and maturity do not apply to me. What is aging?
Of the many definitions, I’ll mention just two: One is “the process of growing old and mature.” Or, a more biological definition, “aging is the endogenous and hereditary process of accumulative changes of molecular and cellular structures disrupting metabolism with the passage of time, resulting in deterioration and death. Aging occurs on both levels, of the whole organism as well as of individual cells”.
Aging is, by far, the leading cause of death; of the approximately 150,000 people who die each day, roughly 100,000 die of aging. In the developed countries, up to 90 percent of deaths are due to aging.
Everything and everybody is aging, or so it seems. In 2012, the average lifespan for the U.S. was 78.49 years, and for the world, it was was 67.59.