Can Humans Live Forever?
Imagine celebrating your 150th birthday and still feeling like you did when you were 40.
Modern advances in genetics, medicine and biotechnology are leading scientists to reconsider what was once impossible: significantly expanding the human lifespan — and maybe even unlocking human immortality.
This article examines:
- What human immortality means
- How long humans can actually live
- What scientists are doing to slow aging
What Do We Mean by Human Immortality?
Humans have always searched for a way to live forever, longing for that elusive Fountain of Youth. Today, that quest has a scientific name: human immortality, the idea of living indefinitely, free from biological aging.
The quest for immortality spans centuries and cultures:
- Ancient Egypt had a large industry centered on death and immortality.
- 16th-century Europeans drank gold to slow down aging (yes, molten gold).
- Modern companies like the Alcor Life Extension Foundation freeze bodies in the hopes that we can revive them in centuries to come.
As the world faces longer lifespans (the global 60+ population is expected to reach 2.1 billion by 2050) and lower fertility rates, scientists are tackling the age-old question: How can we extend our lifespans and eliminate aging?
How Long Can Humans Live?
The global human life expectancy today is a little over 70 years, but some experts believe humans could potentially live to 125.
In 2024, an estimated 722,000 centenarians were alive worldwide. While not everybody will reach 100, that’s a sign that medical advances and technology are slowly increasing how many of us live longer, healthier lives.
In 2025, a molecular biogerontology professor suggested humans could one day live to be 20,000 years old — provided science can combat aging. Futurist Ray Kurzweil goes further, claiming humans will achieve immortality by 2030 with the help of nanobots.
Still, living longer doesn’t necessarily mean living healthier. To understand what limits human lifespan, scientists are exploring the biology of aging and how it affects disease.
Why Biological Aging Makes Us Sick
Biological aging is the greatest risk factor for most diseases, including:
- Heart disease
- Cancer
- Neurodegenerative conditions like Alzheimer’s disease
Scientists often use the term “inflammaging” to describe the slow buildup of inflammation in our bodies that causes age-related diseases over time.
Should Aging Be Classified as a Disease?
Some scientists argue that aging itself should be reclassified as a disease, which would transform how medicine approaches longevity.
Before the 1990s, osteoporosis was viewed as a normal part of aging. Today, it’s officially classified as a treatable disease caused by aging. Some scientists argue that aging could be reclassified in the same way.
If reclassified, the way medicine approaches longevity could undergo some major changes:
- Researchers could develop drugs specifically targeting aging.
- Clinical trials could focus on slowing the aging process.
- Healthcare could shift from treating age-related diseases to preventing them.
- Lifestyle adjustments could become necessary, not optional.
Can Scientists Actually Slow Aging?
Researchers are exploring several experimental approaches that suggest aging may not be as inevitable as we thought.
You may have heard of “biohacking”: trying supplements, therapies and other methods to slow aging. Some people even spend millions on treatments like plasma therapies or high-dose supplement regimens.
But scientists are approaching the problem more systematically. They’ve found, for example, that many centenarians share genetic traits, like a variant of the FOXO3 gene, which may protect against ailments like heart disease, cancer and type 2 diabetes. Discoveries like these are prompting scientists to explore whether genetic engineering could one day “fix” aging-related genes.
Instead of searching for a single “immortality gene,” scientists are studying biological pathways that affect how cells age.
Breakthrough areas of research include:
| Senolytics | Compounds that remove aging cells that accumulate in tissues |
| mTOR inhibitors | Drugs that influence cellular growth and metabolism and have extended lifespan in animal studies |
| NAD⁺ boosters | Molecules involved in cellular energy and DNA repair that decline with age |
| Epigenetic reprogramming | Techniques that may partially reset the biological age of cells |
| Psychedelic geroprotection | Psychedelic compounds like psilocybin that may influence biological pathways linked to aging |
Can We Live Forever?
Maybe not forever. Most researchers agree that humans are biologically limited to about 125 years. But if scientists can slow the aging process, the future may hold something remarkable: longer, healthier lives.
The Takeaway: What We Know About Human Immortality
Here are five key facts to keep in mind:
- The quest for human immortality is ancient.
Across civilizations, humans have long searched for ways to extend life, from ancient rituals and alchemy to modern cryonics. - Human lifespans are increasing.
Life expectancy has risen dramatically over the past century, and more people now live to 100 or beyond than ever before. - Aging could potentially be classified as a disease in the future.
Conditions like cancer, heart disease and neurodegenerative disorders are strongly linked to biological aging. - Scientists are exploring ways to slow aging.
Senolytics, mTOR inhibitors, NAD⁺ boosters and epigenetic reprogramming are among the new strategies emerging to target aging at the cellular level. - Living forever is unlikely … for now.
Some scientists believe the natural human lifespan limit is around 125 years, though advances in medicine may extend the number of healthy years the average person lives.
Lead the Next Era of Longevity With UF
Whether humans will ever achieve immortality is still up for debate. But understanding how we age is becoming one of the most important challenges of our time.
The University of Florida’s fully online master’s degree in innovative aging studies and Graduate Certificate in Aging and Geriatric Practice explore the biological, psychological and social dimensions of aging, preparing professionals, innovators and lifelong learners to support healthier, longer lives.
Study anywhere in the world, on your own time — without sacrificing your career or other commitments.
There’s never been a more exciting time to study aging. Visit our apply page and discover how you can help shape the future of living well.
Sources:
https://egyptfuntours.com/blog/democratization-afterlife-egyptian-market
https://africame.factsanddetails.com/article/entry-1093.html
https://www.businessinsider.com/the-cryonics-companies-selling-the-dream-of-life-after-death-2023-12
https://www.history.com/articles/human-live-forever
https://www.medicalnewstoday.com/articles/biohacking
https://www.psychologytoday.com/us/blog/urban-survival/202208/will-digital-immortality-enable-us-live-forever
https://time.com/6341027/what-is-healthspan-vs-lifespan
