Nils Peder kneels calmly in the midst of a reindeer herd on which his livelihood depends.
Erika Larsen/National Geographic hide caption
Nils Peder kneels calmly in the midst of a reindeer herd on which his livelihood depends.
Erika Larsen/National Geographic hide caption
These two images were taken at the same time of day — one with a digital camera, and one with an iPhone 4S.
Mallory Benedict and Cristina Fletes/NPR hide caption
Sadhu and donkey, Kolkata, India, 2007 (left); Legong dancer II, Amlapura, Bali, Indonesia, 2002 (right)
Martin Westlake hide caption
An estimated 2 million hammerhead sharks are caught for the shark fin trade each year.
Shawn Heinrichs hide captionA modern-day map is paired with a vintage photo of the Arc de Triomphe. Historypin hide caption
Ruth Gruber, Alaska, 1941-43. Photographer unknown/Courtesy of International Center of Photography hide caption
From the series Drowned Gods by Sanjay Kewlani
Sanjay Kewlani hide caption
Jillian, Ellerbe, N.C., from the book Girls With Guns
Lindsay McCrum hide caption
Ddebbie Sears' darkroom in Clerkenwell, central London
Richard Nicholson hide caption
Actors, including Audrey Hepburn, take a break during location filming for Breakfast At Tiffany's in 1961.
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Chicago, 1950
Harry Callahan/Estate of Harry Callahan/Pace/MacGill Gallery hide caption