This 11-year-old boy lives with his family in a Roma settlement in Belgrade. "He and his brothers and sisters are without documents, but he had this amazing confidence," Constantine says. Greg Constantine hide caption
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WaterAid's video — "If Men Had Periods" — was one of three Golden Radiator winners this year. YouTube hide caption
Malian security forces help two women evacuate near the Radisson Blu in Bamako. Habibou Kouyate/AFP/Getty Images hide caption
The Aedes mosquito can spread Zika virus in addition to dengue fever and chikungunya virus. The virus was first spotted in the Americas in 2014. Universal History Archive/UIG via Getty Images hide caption
Burkina Faso was the first country to vaccinate its population against meningitis A. Rodrigue Barry/Courtesy of WHO hide caption
An Iraqi man receives a dose of cholera vaccine in Baghdad on Nov. 1. There have been more than 1,800 cases in the country. SABAH ARAR/AFP/Getty Images hide caption
Patrick Awuah is one of this year's MacArthur "genius" grant winners. The former Microsoft engineer was honored for establishing a new kind of school in his native Ghana. Andrew Heavens/TED hide caption
A newborn in Sierra Leone is treated after delivery by Caesarean section. The country's child mortality rate has dropped from 264 per 1,000 in 1990 to an estimated 120 this year. Lam Yik Fei/Getty Images hide caption
A woman holds her smiling baby in her arms as she arrives at the Hauptbahnhof station in Salzburg, Austria, on Saturday on their way with other migrants from Hungary via Vienna to Germany. Kerstin Joensson/AP hide caption
In the video for "Wildest Dreams," Taylor Swift and Scott Eastwood act out the story of a love affair set in Africa (although her scenes were filmed in California). YouTube hide caption
In the video for "Wildest Dreams," Taylor Swift is all decked out in African colonial-era style. YouTube hide caption
Adama Sankoh, 40 (center), who contracted Ebola after her son died from the disease late last month, stands with health officials the moment after she was discharge from Mateneh Ebola treatment center outskirt of Freetown, Sierra Leone. Alie Turay/AP hide caption
The crowded streets of Kolkata, India, are only going to get more crowded. Randy Olson/National Geographic hide caption
11 Billion People By 2100 — And India Will Be More Populous Than China
Babajide Bello of the tech company Andela takes a selfie with AOL's Steve Case after the pair played a pickup game of pingpong. Courtesy of Andela hide caption