The science of a longer, healthier life
Plain-English explainers on the research behind our life expectancy calculator — diet, biological aging, actuarial life tables, retirement planning and everyday habits.
How Diet Impacts Longevity
What population studies actually show about food patterns, healthy life expectancy, and the diets most consistently linked to longer lives.
The Science of Biological Aging
Why a biological age calculator can tell a different story than your birth certificate — and what actually drives the gap.
Actuarial Life Tables, Explained
The 200-year-old statistical tool behind every life expectancy calculator, Social Security estimate and insurance premium.
Retirement Planning & Life Expectancy: What the Numbers Really Mean
Using a retirement or Social Security life expectancy calculator without over-trusting — or under-using — the number it gives you.
Smoking, Alcohol & BMI: How Everyday Habits Change Your Life Expectancy
What the research says about the habits with the biggest measurable effect on lifespan — and which changes matter most.
These articles are educational summaries of general population research, not medical advice. For guidance about your own health, talk to a qualified healthcare professional.