Gray hair. New wrinkles. Creaky knees.
And then there’s the whole, increasing risk of nearly all diseases and the looming specter of death, thing that comes along with getting older.
Many of us, perhaps upon finding our first white eyebrow hair (hypothetical example), have wondered if aging might be a cosmic joke rather than just the inevitable breakdown of our bodies. Scientists who study aging grapple with a similar conundrum: Is aging an unavoidable consequence of time spent in a physical body, or is it baked into our DNA?
