Berns recently put 30 subjects into MRI machines, where he asked them to compare 54 pairs of abstract three-dimensional images and decide if they were alike or different.

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The fear of lack of control and dreadful consequences overwhelm any sense of the abstract economic benefits of nuclear power, and images of workers in protection suits and news of elevated radiation levels in food and water further fuel antinuclear sentiment on a global scale.

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Alexander Calder became one most recognized artists of the 20th Century, not through the Jungian explorations of the Abstract Expressionists or through the co-opting of everyday images of Pop Artists.

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For the next 20 years they showcased modern art with an emphasis on African-Americans, including work by abstract expressionist Norman Lewis, Boston-born Lois Mailou Jones (known for incorporating African images into her work) and lesser-known Washington-area artists.

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