Today is the 50th anniversary of everyone's favorite modern Stone Age family: The Flintstones! Google is marking the day with a Flintstones themed logo, and we decided to take a walk down memory lane with some of their most memorable moments. Did you know that Fred & Barney once advertised cigarettes? Do you remember all the lyrics to the theme song? Reminisce and find out things you didn't know with this slideshow of funny commercials and clips from "The Flintstones." Vote for your favorite!