Bruce Jenner

Good Genes

or Good Docs?

8/23/2009 2:30 AM PDT BY TMZ STAFF
Bruce Jenner's 1976 Olympic decathlon gold medal will never get old, but what about his face?

Here's the 29-year-old back in 1979 (left) -- and 30 years later, the 59-year-old version at an event a few months ago (right).

He's a natural.