Over the years, MAD Magazine did so many parodies of Peanuts that Charles Schulz once wrote in to suggest that he could retire and let them take over his strip. Many of those parodies will soon be part of an exhibit at the Charles M. Schulz Museum in Santa Rosa, California. On March 20, the exhibit will kick off with an appearance and speech by Sergio Aragonés, who has been drawing for MAD since John Quincy Adams was president. Or maybe it just feels that way.