system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] Are there any other events that could account for a nationwide or worldwide extension of people's lifespans in the MU?

 In the Marvel Universe, there are many characters who are connected to historical events but are also still active today and in their prime. Many have reasons given to why they are still young, like Captain America being frozen in ice or Namor being Atlantean. But there are many shown who have not had any explanation, like Magneto, who was a child in World War II but was still active in the modern era but before Mutant X restored his youth. Or Doctor Octopus, who met Dr. Strange before Strange damaged his hands in 1963.

Other than the sliding timeline, are there any other events that could account for a nationwide or worldwide extension of people's lifespans in the MU? I know they did explain thin in the DC Universe, when a villain Ian Karkull died, and released chronal energy that gave many of the heroes present enhanced longevity, and it possibly affected the world at large.
gpt
The sliding timeline is in universe: time itself is broken.

Galactus explains this: the sheer amount of often multiverse changing events occuring in such a short time has "unmoored"  the age of heroes  from the normal timestream- it keeps moving forwards. There's a very real possibility people-at least people important to those events- *aren't aging anymore.*  They're just moving further into the future.

For example, magneto is 70ish. As time drags him forwards, he *remains* 70ish, even as he gets further into the 21st century. Time moves with him.

These temporal inconsistencies are in universe, the result of time breaking under the sheer weight of history. A few people have noticed.