The Science of Aging: What We Know Now
Aging happens to all of us, yet the science behind it is anything but simple. Why do we age? Can we slow it down? What’s fact—and what’s just hype? Let’s break down what scientists have learned so far, and where the frontier of aging research is heading. The Basics: What Causes Aging? At its core, aging is a biological process. Over time, our cells accumulate damage. DNA gets copied less accurately, proteins misfold, and our bodies become less efficient at cleaning up cellular waste. This leads to what researchers call "cellular senescence" — basically, when cells stop dividing and start acting more like clutter than contributors. Other key players in the aging process include: Telomeres: Protective caps on the ends of DNA strands that shorten with each cell division. Mitochondrial decline: Our cells’ energy factories wear down over time. Chronic inflammation: A low-grade, persistent immune response that damages tissues. What Science Is Doing About It We’re not talking...