Imported from Europe, the custom of leaving gratuities began spreading in the U.S. post-Civil War. It was loathed as a master-serf custom that degraded America's democratic, anti-aristocratic ethic. Hulton Archive/Getty Images hide caption

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Tugba Sunguroglu, Ilayda Akdogan, Doga Zeynep Doguslu, Elit Iscan and Günes Sensoy play five orphaned teen sisters who live with their grandmother in the film Mustang. Cohen Media Group hide caption

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Historian Mary Beard says real gladiator competitions were probably not as brutal as the film Gladiator (starring Russell Crowe) would have us believe. Still, she says, "I loved Gladiator and I thought its depiction of gladiatorial combat, although it was an aggrandizing picture, was cleverly and expertly done." Universal/Getty Images hide caption

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Rosa Parks joins in a march at the South African Embassy in Washington, Dec. 10, 1984, protesting that country's racial policies. She's famous for refusing to give up her seat on a bus in 1955, sparking the Montgomery boycotts — but her activism spanned her entire life. AP hide caption

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In Star Wars: Battlefront, gamers can take their pick of customization options for the characters they play. Courtesy of EA hide caption

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Project Runway host Heidi Klum and Tim Gunn at the Project Runway Spring 2013 fashion show in New York City. Today, Gunn is comfortable before an audience — but it wasn't always that way. Stephen Lovekin/Getty Images for Mercedes-Benz Fashion Week hide caption

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