Five savory cupcakes: Chicken potpie, lasagna, grilled cheese, mac n' cheese and the Thanksgiving leftovers. Courtesy of @LisaSKim hide caption

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Alf Kumalo, a celebrated South African photographer, died Sunday of prostate cancer in Soweto. He was 82. Here, he is seen in April outside the Magistrate Court in Johannesburg, while pursuing a hate speech case against a white man he accused of attacking him with a racial slur. Themba Hadebe/AP hide caption

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Health workers transport the polio vaccine by donkey in southeastern Pakistan. Asad Zaidi/Courtesy of UNICEF Pakistan. hide caption

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Winner - Behavior: Cold-blooded Animals - A yacare caiman waits for fish to come within snapping reach in the shallow, murky waters of Brazil's Pantanal - the biggest wetland in the world. Caimans can grow to be three meters in length. Luciano Candisani/Veolia Environnement Wildlife Photographer of the Year 2012 hide caption

toggle caption Luciano Candisani/Veolia Environnement Wildlife Photographer of the Year 2012

Children in a Lahore slum after heavy rains. The slum has a large population of Pashtuns who came from Pakistan's lawless tribal regions; many carry the polio virus with them. Jackie Northam/NPR hide caption

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Reporter Ashley Parker transmitted these two different views of the campaign trail via Instagram. In the photo on the left, Mitt and Ann Romney stroll on the beach. On the right, the media pool chases after them. Courtesy of Ashley Parker/The New York Times hide caption

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Sahya Idriss, a service provider at the health clinic in Minjibir, carries a vial of the polio vaccine. David Gilkey/NPR hide caption

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During the peak of the polio epidemic in the U.S., some hospital wards even had large, room-like iron lungs where multiple children lived. Courtesy of Boston Children's Hospital Archive hide caption

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