In Namibia today, members of the ancient tribe of hunter-gatherers still forage. New genetic research reveals they were once the largest group of humans. Stephan C. Schuster/Penn State University hide caption

itoggle caption Stephan C. Schuster/Penn State University

Ramon Maldonado takes his driving test with the Arizona Department of Transportation Motor Vehicle Division. Many young immigrants protected from deportation under the Obama administration's new policies began pursuing driver's licenses in the state Monday. Ross D. Franklin/AP hide caption

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Carmen Martinez Ayuso, 85, prays during her eviction from her home in Madrid, Spain, on Nov. 21. A professional Spanish soccer team, Rayo Vallecano, has come to her aid, promising to pay her housing costs for the rest of her life. Andres Kudacki/AP hide caption

itoggle caption Andres Kudacki/AP

Farmers confront riot police at the site of the Letpadaung copper mine in northwestern Myanmar on Monday. A woman was fatally shot during a crackdown on protesters at the Chinese-backed copper mine. AP hide caption

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A Milwaukee prosecutor says no charges will be filed against a police officer who shot and killed Donte Hamilton in April. Here, Maria Hamilton holds posters used in rallies that vent frustrations about the death of her son. M.L. Johnson/AP hide caption

itoggle caption M.L. Johnson/AP

Pope Francis delivers his message during a meeting with cardinals and bishops of the Curia at the Vatican on Monday. The pope said the Curia suffered from "spiritual Alzheimer's" and careerism. Andreas Solaro/AP hide caption

itoggle caption Andreas Solaro/AP

People sing as they take part in a prayer vigil at the site where two police officers were shot to death in the Brooklyn borough of New York this weekend. Carlow Allegri/Reuters /Landov hide caption

itoggle caption Carlow Allegri/Reuters /Landov