Best Actress nominee Quvenzhané Wallis is interviewed on the red carpet at the Academy Awards Sunday, when several journalists struggled with the young actress's name. Joe Klamar/AFP/Getty Images hide caption

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Joe Klamar/AFP/Getty Images

Twitter announced its partnership with Vine, a video-sharing app that posts six-second videos onto a tweet, on Thursday, Jan. 24. Marie McGrory/NPR hide caption

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Marie McGrory/NPR

President Obama and House Speaker John Boehner on Nov. 16. Carolyn Kaster/AP hide caption

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Carolyn Kaster/AP

Investors and financial analysis firms are increasingly looking at "sentimental analysis" — such as Facebook "likes" and Twitter messages — to gauge a company's social popularity. hide caption

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How Much Is A 'Like' On Facebook Worth For A Company's Share Price?

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A young boy works at an illegal gold mine in Dareta, Nigeria. David Gilkey/NPR hide caption

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David Gilkey/NPR