Tuesday

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This image is from a test called "Weights," which was part of the study. Participants need to determine the relationships between the objects rather than focus on their individual properties. Courtesy of the BBC hide caption

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Monday

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Monday

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John S. Cummins, former bishop of the diocese of Oakland, Calif., recalls correspondence from Cardinal Joseph Ratzinger, now Pope Benedict XVI, regarding troubled priest Stephen Kiesle. Ratzinger resisted defrocking Kiesle, who had a record of sexually molesting children, after his case had languished for four years at the Vatican. Marcio Jose Sanchez/AP hide caption

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Sunday

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In Prague on Thursday, President Obama and Russian President Dmitry Medvedev signed an arms reduction treaty. But fears of an attack by a nuclear-armed superpower have given way to concerns about a nuclear-armed terrorist. Yuri Kadobnov/AFP/Getty Images hide caption

toggle caption Yuri Kadobnov/AFP/Getty Images
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