Renewable energy sources — such as the Eolo wind park about 75 miles south of the Nicaraguan capital, Managua — generate about half of the country's electricity. Officials predict that figure could rise to 80 percent within years. Inti Ocon/AFP/Getty Images hide caption
Legendary norteño group Los Alegres de Terán, in a promotional still from the 1976 documentary Chulas Fronteras. Courtesy of The Arhoolie Foundation Frontera Archive/UCLA Chicano Studies Research Center Press hide caption
Dura Europos, a Roman walled city in eastern Syria, dates back to 330 B.C. The main gate is shown here in a photo from 2010. It's one of the many important archaeological sites militants of the self-styled Islamic State have ransacked and damaged. EPA/Deir Ezz-Zour Antiquities Department/Landov hide caption