Sean Connery and Patrick Stewart looked like they were 55 between the ages of 25 and 85. Conversely, Paul Rudd and Joseph Gordon-Levitt looked like they were 15 between the ages of 15 and 40.
Jesus Christ don't say that ..... you just made me look it up and realize how true this statement was for myself as well .... what have I done with my life?
Wear. Sunscreen. If I could offer you only one tip for the future, sunscreen would be it. The long term benefits of sunscreen have been proven by scientists, whereas the rest of my advice has no basis more reliable than my own meandering experience.
The Connery photo is natural lighting and properly exposed for his skin tone. The newer photo is artificially lit, much brighter for the skin tone and could have been retouched to blur the skin some. The photo on the right may have also had makeup on, vs on the left not likely.
Harrison Ford was 38 when Raiders of the Lost Ark was released. Raiders took place in 1936 so if Indiana was meant to be the same age as Ford then he was born in 1898. The Last Crusade took place in 1938 so Indiana would be 40 at the time. That would make him 19 years younger than his father, assuming that Henry Jones Sr. and Sean Connery were the same age.
I think what they mean is the picture is implying it's due to generational changes when you could find a younger looking 34 year old then and an older looking 34 year old now. It's a sample size of one. By definition that's argument from anecdote, there's no way you can infer generalities from that without being hasty.
Brodie-Sangster doesn't look that young in all his pictures but Connery does look about 55, like he never was a young adult, just a kid then immediately a middle aged man.