NAT KING COLE ASKED: A "Do you smile to tempt a lover, Mona Lisa, or is this your way to hide a broken heart?" If a Maryland art expert and dentist is correct, what Mona Lisa may have been hiding was ...

The Mona Lisa Smile in question belongs, of course, to its star, Julia Roberts. Why? For no particular reason, actually. It’s just what Italian professor Bill Dunbar (Dominic West) calls her — Mona ...