Most people feel time speeding up as birthdays stack and bodies slow down. Small aches linger longer, recovery takes more effort, and the idea of adding decades can feel both tempting and exhausting. Aging is personal, unavoidable, and for many, quietly unsettling.
For years, scientists have argued over whether humans are nearing a natural limit. One researcher now believes that limit is far from fixed and that radical change may come sooner than expected.
Testing the limits
The longest confirmed human life remains that of Jeanne Louise Calment, who died in 1997 at 122 years old.
Since then, no one has come close, reinforcing the idea that human biology eventually runs out of resilience.
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Some scientific models suggest a ceiling around 150 years, where cells can no longer repair themselves effectively. According to reporting by Time, this threshold may not be permanent.
Professor Steve Horvath, a researcher at Alto Labs in the UK, has spent years studying biological aging rather than calendar age.
He is best known for creating the Horvath aging clock, a tool that estimates how old a body truly is by examining molecular changes.
Unlike birthdays, biological age reflects wear and tear inside the body. Horvath has described these measurements as essential for understanding how aging might be slowed.
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A longer future
Horvath believes that if humanity avoids catastrophic wars and global pandemics, someone will eventually reach 150. He said he has “no doubt it will happen,” according to Time.
Drugs aimed at extending lifespan already exist in early testing, but practical treatments remain distant.
For now, the real breakthrough may be learning how to measure aging precisely, giving science a clearer target.
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