Protesters shout slogans against Mexican President Felipe Calderon in front of the National Congress where the president delivers his annual address in Mexico City,  Sept. 2. Recent opinion polls confirm that the majority of Mexicans feel that their country is worse now than it was when Calderon took over in 2006. Luis Acosta/Getty Images hide caption

Basking sharks have been added to the "species of concern" list, and scientists hope to learn more about how the giant fish behaves in Pacific waters. Gregory B. Skomal/NOAA hide caption