Human cells may have a hard biological limit that prevents living past 120

Despite rapid advancements in medical technology, human lifespan growth has hit a significant plateau. While 19th-century improvements in sanitation and vaccines successfully doubled the average lifespan from 40 to 80 years, pushing beyond that mark has proven much more difficult. Recent studies indicate that our biological systems face a hard limit because cellular repair mechanisms begin to fail at an exponential rate once a person reaches their 70s.