I’ve always thought there’s a psychological effect as well. Baseball players who were old when I was a kid look (way) older than same-aged players today. Like 20 years different, and it can’t be the sun and smoking. I’ve always felt I just knew what they looked like. And what was older then is now “damn near college” for me now. But typing this, maybe it’s just the presence or absence of crows feet at the eyes? The hands certainly show peoples age (still).