Honestly I think people look WAY younger for WAY longer these days. Watching those old shows and movies, even from just the 70's and 80's and it's like 40yo = today's 60yo.
Medical advances, smoking and hard liquor not being consumed every damned second, "better" diets, not living through world wars or the "imminent" threat of nuclear annihilation, people waiting to have kids, etc are things that likely contribute.
Like how old was Archie Bunker supposed to be? Probably late forties. He would have easily passed for 60 today.
Then there's my dear ole mumsy from that generation. She had a brutal life but never smoked, was never much of a drinker, ate a pretty decent and consistent diet, kept (and keeps) active. She's in her early 70's and looks like she might be in her 50's while all her friends SERIOUSLY look their age. It's startling.
And no... you guys may NOT have my mother's phone #.
Dirty buggers.