American writer, abolitionist and orator Frederick Douglass edits a journal at his desk, late 1870s. Douglass was acutely conscious of being a literary witness to the inhumane institution of slavery he had escaped as a young man. He made sure to document his life in not one but three autobiographies. Hulton Archive/Getty Images hide caption

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Hulton Archive/Getty Images

Cahokia Mounds State Historic Site in Collinsville, Ill. A thriving American Indian city that rose to prominence after A.D. 900 owing to successful maize farming, it may have collapsed because of changing climate. Michael Dolan/Flickr hide caption

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Michael Dolan/Flickr

A woman farmers harvests pearl millet in Andhra Pradesh, India. Millets were once a steady part of Indians' diets until the Green Revolution, which encouraged farmers to grow wheat and rice. Now, the grains are slowly making a comeback. Courtesy of L.Vidyasagar hide caption

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Courtesy of L.Vidyasagar

If they're able to swim to hot water, carp will survive infection with a type of herpes virus. Jean-Louis Wertz/University of Liege hide caption

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Jean-Louis Wertz/University of Liege

At Everyman Espresso in New York City's East Village, customers were greeted with a sign announcing a fundraiser to help defend immigrants. Allison Aubrey/NPR hide caption

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Allison Aubrey/NPR

Amid Travel Ban Debate, Chefs And Food Brands Take A Stand On Immigration

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Green tips of of a newly developed grain called Salish Blue are poking through older, dead stalks in Washington's Skagit Valley. Eilís O'Neill/KUOW/EarthFix hide caption

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Eilís O'Neill/KUOW/EarthFix

This wild hog from Hawaii was raised at the National Wildlife Research Center in Fort Collins, Colo. Feral pigs in the wild tend to eat anything containing a calorie — from rows of corn to sea turtle eggs, to baby deer and goats. Rae Ellen Bichell/NPR hide caption

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Rae Ellen Bichell/NPR

Scientists Get Down And Dirty With DNA To Track Wild Pigs

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Mike McCloskey, his cousin Manuel Perez (left), and one of their co-workers on a beach at the edge of their new farm in Puerto Rico. McCloskey and Perez played on this beach as children. Dan Charles/NPR hide caption

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Dan Charles/NPR

Chasing A Dream Built On Dairy, This Master Of Milk Came Home

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A still from Budweiser's Super Bowl ad tells the story of one of Budweiser's founders. Budweiser via YouTube/ Screenshot by NPR hide caption

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Budweiser via YouTube/ Screenshot by NPR

A Yemeni business owner closes the gate to his store Thursday in the Brooklyn borough of New York City. Across the city, Yemeni-owned bodega and grocery stores will shut down from noon to 8 p.m. to protest President Trump's executive order banning immigrants and refugees from seven Muslim-majority countries, including Yemen. Spencer Platt/Getty Images hide caption

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Spencer Platt/Getty Images

At first, the camel burger that restaurateur Jamal Hashi spent months trying to perfect didn't sell well. By choosing a different cut of meat, however, he discovered the potential for the burger. Tom Baker for NPR hide caption

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Tom Baker for NPR