Soldiers from Burundi arrive at the airport in Bangui, capital of the Central African Republic, on Dec. 15 to join the African Union and French efforts to restore security in the troubled nation. Sia Kambou/AFP/Getty Images hide caption

Research excavations like these in Siberia's Denisova Cave are yielding clues to the mating choices of early hominids. Bence Viola/Nature hide caption

Oregon is still using paper applications to enroll people through the Affordable Care Act. iStockphoto hide caption

Alina, Valerie, Joe and Vicki Darger live in a polygamous relationship and have 25 children. Laurentiu Garofeanu/Barcroft Media /Landov hide caption

This summer, movie studios were up to their necks in big-budget blockbusters, including Disney's The Lone Ranger, which ended up a huge bomb. Peter Mountain/Walt Disney Pictures hide caption

Mark Udall of Colorado is one of the Democrats on the Senate Intelligence Committee pressing for the so-called torture report to be declassified. Susan Walsh/AP hide caption

James Breton is a sophomore at the Academy for Software Engineering, one of several small schools now housed in New York's Washington Irving High School building. Beth Fertig/WNYC hide caption

When Benta Odeny was diagnosed with HIV, she started to protect her husband Daniel from the virus by taking antiretroviral medications. The same drugs also helped her give birth to an HIV-negative daughter, Angelia. Gregory Warner/NPR hide caption