I mean, they looked more adult. If you look at a high school year book from decades ago the seniors look like they're in their 30s. Maybe this means time is speeding up, or that life was harder then which aged them, like how outdoor cats often look all haggard. Then again was life really that much harder in the 1960s?
Are you sure it's not just that their hair and fashion styles are those of a previous decade and that that triggers the "this person is old" neurons in your brain?
