The Birthday Pig, 2007, a collage on light jet print, by Marnie Weber. Part of the exhibition Larry Johnson and Marnie Weber at Patrick Painter Gallery. Through March 15, at Bergamot Station in Santa Monica. (Image courtesy of the artist and Patrick Painter.)

• L.A.: Hammer Lectures: The Future of Institutional Critique, with Judith Barry, Dara Birnbaum, and Mary Kelly, at the Hammer Museum. Today at 7:30pm, in Westwood.
• L.A.: Katie Herzog, Altered State Library, at Monte Vista Projects. Opens Saturday at 7pm, in Northeast L.A.
• Aspen: Amy Sillman, One Lump or Two, at the Aspen Art Museum. Opens Friday.
• Baton Rouge, La.: Rooted Communities: The Art of Nari Ward, at the Louisiana State University Museum of Art. Through April 10.
• Cambridge: Jorge Otero-Pailos, Space-Time, at the Keller Gallery. Through February 23, at MIT’s Building 7.
• Waltham, Mass.: Mika Rottenberg: Bowls Balls Souls Halls, Chris Burden: The Master Builder, and The Matter That Surrounds Us: Wols and Charline von Heyl, at the Rose Art Museum. Opens Thursday at 5pm.
• Philadelphia: Ruffneck Constructivists, curated by Kara Walker, at the Institute of Contemporary Art. Opens today, at the University of Pennsylvania.
• NYC: A Collective Invention: Photographs at Play, at the Morgan Museum and Library. Opens Friday, in Midtown.
• NYC: Pawel Althamer: The Neighbors, at the New Museum of Contemporary Art. Opens today, on the Lower East Side.
• NYC: Diana Al-Hadid: Regarding Medardo Rosso, at Marianne Boesky. Through March 19, on the Upper East Side.
• NYC: Simon Evans, Edible Landscape, at James Cohan Gallery. Opens Thursday at 6pm, in Chelsea.
• NYC: Julian Crouch, Mark Stewar, Ragna Freidank and Christophe Laudamiel, Armchair Parade, at Dillon Gallery. Opens Thursday, in Chelsea.
• NYC: Henry Chalfant, at Steven Kasher Gallery. Through March 8, in Chelsea.
• NYC: Edward Clark, Big Bang, at Tilton Gallery. Through February 22. (Via Weisslink.)
• NYC: Karlheinz Weinberger, at Maccarone. Opens Saturday at 6pm, in the West Village.
• NYC: Richard Hart and Tom Kotik, at Field Projects. Opens Thursday, on the Lower East Side.
• NYC: Idiom II, at Pierogi. Opens Friday at 7pm, in Williamsburg.
• NYC: Tip Top, at Greenpoint Terminal Gallery. Opens Saturday, in Greenpoint.
• NYC: David Henderson, Patricia Satterlee and Jude Tallichet, at Valentine. Opens Friday at 6pm, in Ridgewood/Bushwick.
• Savannah: Tim Rollins and K.O.S., Rivers, at the SCAD Museum of Art. Through June 8, at the Savannah College of Art and Design.
• Montreal: Rick Prelinger, No More Road Trips?, a screening, at Concordia University. This Friday at 6pm, at the J.A. de Seve Cinema.
• London: La Fine de Dio: Maurizio Cattelan and Lucio Fontana, at Gagosian Gallery. Through April 5, in London.
• Bilbao: Ernesto Neto: The Body That Carries Me, at the Guggenheim Museum. Opens Friday.
• Sittard: Brandon Ballengée, Seasons in Hell, at Museum Het Domein. Opens Sunday.
• Doha: Mona Hatoum: Turbulence, at Mathaf: Arab Museum of Modern Art. Through May 18.
• Online: Guerilla Girls, Feminist Street Posters: 1985-91, at Gallery98.