The sign, a private marker placed by the NAACP, and approved by the National Park Service, as it now stands in Army Park. Christopher Blank/WKNO-FM hide caption

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Do The Words 'Race Riot' Belong On A Historic Marker In Memphis?

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"My home," exclaims Movses Haneshyan, on seeing the enlarged image presented to him by photographer Diana Markosian. He'd fled with his father at age 5. Diana Markosian hide caption

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Human sacrifice helped solidify systems of social hierarchy, according to a new study of traditional cultures in the Pacific Ocean. Here, an engraving shows English explorer James Cook witnessing a human sacrifice ritual in Taihiti in the 1770s. The image comes from the 1815 edition of Cook's Voyages. Universal Images Group/Getty Images hide caption

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A German edition of Adolf Hitler's Mein Kampf. Tobias Schwarz/AFP/Getty Images hide caption

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Springtime For Hitler: With 'Mein Kampf' Back In Stores, Germany Turns A Page

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A flag reading "Refugees welcome here" greets visitors to London's Immigration Museum, located on Princelet Street in an East End building that housed immigrants from the early 18th century onward. Today the museum, in need of structural repairs, is open only on certain days and by appointment for groups. Peter Kenyon/NPR hide caption

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As European Migrants Face British Backlash, A Reminder: They're Not The First

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Czar Nicholas II is shown with his family in the 1910s. All were executed shortly after the 1917 Russian Revolution. Remains of the czar, his wife, Alexandra (top right) and their children — Olga (from left), Maria, Anastasia, Alexei and Tatiana — have all been identified. Now the Russian Orthodox Church has ordered new DNA tests to confirm the identities of Maria and Alexei. Fine Art Images/Heritage Images/Getty Images hide caption

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Will DNA Tests Finally Settle Controversy Surrounding Russia's Last Czars?

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Kalen Gilliam (left) and Justis Jackson take measurements at the Urban Archaeology Corps excavation site about 10 miles outside Richmond, Va. Catherine Cozzi/Groundwork RVA hide caption

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Teens Dig Into Black History As Urban Archaeologists

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Greek flags fly beside those of the European Union in Athens. Many people chalk the phrase up to Shakespeare, but its origins likely date back much earlier than that --€” to medieval monks eager for a cop-out. Matt Cardy/Getty Images hide caption

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Is It All Greek To You? Thank Medieval Monks, And The Bard, For The Phrase

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An untouched chalkboard from 1917 was found behind a classroom wall at Emerson High School in Oklahoma City. Jacob McCleland/KGOU hide caption

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School Scrambles To Preserve Newly Discovered Chalkboards From 1917

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Reverend Jeff Moore blesses a biker at the Buffalo Soldiers Motorcycle Club rally in San Jose, Calif. Leila Day/KALW hide caption

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On Steel Horses They Ride — To Honor 19th-Century Cavalries

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The 'Math Guy' Presents 5 Facts About 3.14

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Coins from the Thomas Lockwood Collection were recently found to be rare and priceless. From a description by the University at Buffalo, from top to bottom: A gold aureus of the Roman emperor Otho; a tetradrachm of Athens; a tetradrachm of Alexander the Great; a silver tetradrachm of Syracuse (Sicily); a gold aureus of the emperor Nero; and a gold octodrachm of Arsinoe II." Douglas Levere/University at Buffalo hide caption

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Russian soldiers guard the entrance to the Ukrainian military base in Perevalne, Crimea, last March. Russia was criticized widely internationally after seizing the region. Now Russian lawmakers are considering a bill that says Crimea was illegally given to Ukraine in 1954 and should have been part of Russia all along. Ivan Sekretarev/AP hide caption

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Until about 30,000 years ago — around the same time these animals were drawn on the walls of France's Chauvet Cave — there were at least five other species of humans on the planet. Jeff Pachoud/AFP/Getty Images hide caption

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We Went From Hunter-Gatherers To Space Explorers, But Are We Happier?

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