Tuesday, May 13, 2014

Why Do We Age?

aging

Gray hair, memory loss, wrinkles and brittle bones, sooner or later, each of us gets old (if we’re lucky). Yet scientists tell us that there is no evolutionary reason for us to age. So, why do we? 

The Aging Process

Researchers do not agree as to the causes of aging. Some claim our genes are programmed to deteriorate, wither and die, while others believe accumulated damage is the root of our senescence. Muddying the waters further, many believe that a combination of several factors contributes to aging. 

Cell Damage

Around since 1882 when biologist August Weismann first introduced it, at its fundamental level, the cell damage theory holds that the body succumbs to “wear and tear“: “Like components of an aging car, parts of the body eventually wear out from repeated use, killing them and then the body.”

Building on this fundamental idea, a number of researchers today are exploring particular physiological aspects to reveal where and how this “wear and tear” occurs.

For the rest of the story: http://www.todayifoundout.com/index.php/2014/05/age/

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