Samuel L. Jackson Good Genes or Good Docs?

6/23/2013 12:30 AM PDT

Samuel L. Jackson: Good Genes or Good Docs?

Samuel L. Jackson's looks are off the chains.

Here's the foul-mouthed 47-year-old "Pulp Fiction" gangster hanging out in Beverly Hills back in 1995 (left) -- and 18 years later the 64-year-old "Django Unchained" actor at a benefit gala earlier this month (right).

The bleeping question is...