Abstract expressionist artist Helen Frankenthaler, pictured above in 1956, adopted Jackson Pollock's technique of painting canvases laid flat on the floor. She sought to "marry" the paint with the canvas, she said. Gordon Parks/Time Life Pictures/Getty Images hide caption

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Anthropologist Nicholas Conard (left) and filmmaker Werner Herzog examine artifacts from the Chauvet caves in southern France. Mark Valesella/IFC Films hide caption

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Woman I (1950-52) is one of the works featured in de Kooning: A Retrospective. The exhibit is on display at the Museum of Modern Art through Jan. 9, 2012. John Wronn/Museum of Modern Art hide caption

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A model shows a view of the Crystal Bridges pavilion some museum staff refer to as "the armadillo" because of how its curved, copper bands resemble the animal's shell. John Horner/Crystal Bridges Museum of Art hide caption

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If The Art Museum were a real museum and not just a book, there would hardly be need for another. At 18 pounds and 922 pages, the expansive book is organized into thematic "galleries," and within those "rooms" dedicated to solo artists, like Picasso. Phaidon hide caption

itoggle caption Phaidon

In a charcoal and pastel version of Dancers at the Barre, Degas tries out a variation on the dancers' head and leg positions.

National Gallery of Canada, Ottawa hide caption

itoggle caption National Gallery of Canada, Ottawa

Many of Degas' nudes have their backs turned to the viewer. Above, Degas' pastel work, After the Bath, Woman Drying Her Neck, 1886-95. Photo Musee d'Orsay/rmn/Museum of Fine Arts, Boston hide caption

itoggle caption Photo Musee d'Orsay/rmn/Museum of Fine Arts, Boston

The Asia Series is Bob Dylan's first exhibit in New York.

William Claxton/AP hide caption

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