A student prays in front of a temporary altar during a rally outside government headquarters in Hong Kong on Sept. 24. Bobby Yip/Reuters /Landov hide caption

itoggle caption Bobby Yip/Reuters /Landov

Tourists walk past a poster of Pope Francis hanging on the Church of the Nativity in the West Bank town of Bethlehem on Monday. Pope Francis' trip to the Mideast later this week will commemorate the 50th anniversary of a historic rapprochement between Catholics and Orthodox, who split nearly 1,000 years ago. Mussa Qawasma/Reuters/Landov hide caption

itoggle caption Mussa Qawasma/Reuters/Landov

A new study ranks 100 American cities according to how "Bible-minded" they are. The top spot went to Chattanooga, Tenn. Several cities in the Northeast and West were ranked "least Bible-minded." Joseph Kaczmarek/AP hide caption

itoggle caption Joseph Kaczmarek/AP

Swarms of locusts in Madagascar, or clouds of elementary particles, without sound, odor, flavor or color? Reality is harder to pin down than you first might think. Bilal Tarabey/AFP/Getty Images hide caption

itoggle caption Bilal Tarabey/AFP/Getty Images