DEATH DATE 3000 BLOG

Straight answers on life expectancy, longevity habits, and the math behind mortality calculators โ€” no fear-mongering, just what the data actually says.

Does Smoking Really Take Years Off Your Life? Here's What the Data Says

A look at the actual research behind the "10 years" number, how it's calculated, and what quitting at different ages does to your life expectancy.

Published 2026

How Is Life Expectancy Calculated? A Plain-English Breakdown

Actuarial tables, cohort vs. period life expectancy, and why every online calculator (including ours) is a simplification. What's actually going on under the hood.

Published 2026
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Does Alcohol Shorten Your Life? What the Research Actually Shows

The "a glass of wine a day is good for you" idea has been walked back by more recent research. Here's what current evidence actually says.

Published 2026
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How Much Does Exercise Really Add to Your Life Expectancy?

You don't need to become a marathoner. What research shows about exercise and longevity, and where the returns start to level off.

Published 2026
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How Sleep Affects Your Life Expectancy (Too Little AND Too Much)

Both too little and too much sleep are linked to higher mortality risk in research. Here's the U-shaped curve, explained.

Published 2026
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Is BMI Actually a Good Predictor of Lifespan?

BMI is used everywhere, but it wasn't designed to assess individual health. What it gets right, what it misses, and why it's still so common.

Published 2026
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How to Add Years to Your Life: What Actually Works, Ranked

Not all longevity advice carries the same evidence. A roughly ranked look at what actually moves the needle, biggest impact to smallest.

Published 2026
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Life Expectancy Calculators: How Accurate Are They, Really?

These tools can't predict your actual death date โ€” no tool can. What they're genuinely good at, and how to read your own results.

Published 2026