Hailed as a classic study, Linda Dalrymple Henderson's The Fourth Dimension and Non-Euclidean Geometry in Modern Art presented new perspectives on the spatial and the spiritual in modern art. In a newly introduced edition, Henderson, centennial professor in art history at the University of Texas at Austin, reveals that fourth-dimension theories have played a crucial part in the development of modern art.

In this program, she will examine in 4-D the art of Takis.

Takis: The Fourth Dimension, on view through July 26, is the first U.S. museum survey of the artist's work. Dubbed by Marcel Duchamp as "the happy ploughman of magnetic fields," Takis (born Panagiotis Vassilakis, 1925) has pushed into new aesthetic territory by creating three-dimensional works of art that incorporate invisible energies as a fourth element.