CHUCK NORRIS Good Genes or Good Docs?

7/7/2013 3:25 AM PDT BY TMZ STAFF
0702_chuck_norris_good_genes_launch_v2Chuck Norris is an American MAN!

Here's the 46-year-old martial arts master at the Second Annual Stuntman Awards back in 1986 (left) -- and the 72-year-old bearded badass at a movie premiere late last year (right).

Chuck yeah!

The question is...