healthspan
2 free lessons tagged healthspan across Science. Each one is a short sequence of focused steps with narration and a five-question quiz at the end — take them in any order, no signup required.
How to Live Longer: What the Evidence Really Shows
Longevity advice is a sea of hype, but a few levers have genuinely strong evidence behind them. Learn to rank interventions by evidence quality, then meet the biggest proven ones: cardiorespiratory fitness (the single strongest predictor of lifespan), muscle strength, diet, sleep, and the avoidables. See the real numbers from large studies and why these boring basics act on the hallmarks of aging.
Why We Age: The Hallmarks of Aging
Aging is not vague wear and tear, it is a set of specific, measurable biological processes. Learn the crucial difference between lifespan and healthspan, then the twelve hallmarks of aging, the scientific framework of what actually goes wrong in the body over time, from telomere shortening and zombie cells to chronic inflammation, and why they form a connected web rather than a single cause.