A massive Robert Crumb retrospective curated by Todd Hignite just opened at the Yerba Buena Center for the Arts in San Francisco. It runs from March 16 to July 8, 2007.

The show includes over 200 of the best examples of Crumb's art, spanning his prolific and rich lifetime body of work.

Here's 81 photos taken on the opening day.

R. Crumb's Underground