The history of humor

It's been a knee-slapper of a century for the art of American humor, from the silent pie fights of Laurel and Hardy to the rhythmic repetition of a single cowbell on Saturday Night Live. This April Fool's Day, we've charted some hilarious moments of comedy. Click on the images to see more about each piece of history.

Phillip Niemeyer is a designer and director at NorthernSouthern in Austin and Brooklyn. Jay Ruttenberg is the editor of the "The Lowbrow Reader" and "The Lowbrow Reader Reader."

CHIQUI ESTEBAN, PATRICK GARVIN, ALEX PEARLMAN/GLOBE STAFF