Tom Selleck: Good Genes or Good Docs?

10/11/2008 11:52 AM PDT BY TMZ STAFF
Neither "Magnum P.I." star Tom Selleck, nor his pornstache have aged since the '80s.
Tom Selleck
Here's 37-year-old Tom back in 1982 (left) -- and the 63-year-old well-preserved version (right) at an award show recently.

Tom should come out with his secret.