Next up in the Chicago Theatre's popular "Speaker Series: Minds That Move The World": former Vice President Al Gore. Mr. Inconvenient Truth will speak on climate change at 7:30 p.m. on April 1, with The Week editor-at-large Sir Harold Evans moderating. Tickets range from $35-$185; get 'em here or here.

Other upcoming Speaker Series events:

April 22: Chris Matthews interviewing Tucker Carlson, Arianna Huffington and Paul Begala

May 28: Charlie Rose interviewing James Carville and former Deputy Chief of Staff Karl Rove