In a post on Facebook CEO Mark Zuckerberg wrote that the live-streamed images following a police shooting in Minnesota were "graphic and heartbreaking." Josh Edelson/AFP/Getty Images hide caption

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In Wake Of Shootings, Facebook Struggles To Define Hate Speech

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This photo provided by Rep. John Yarmuth, D-Ky., shows Democrat members of Congress, including Rep. John Lewis, D-Ga., (center) and Rep. Joe Courtney, D-Conn., (left) participating in a sit-down protest seeking a vote on gun control measures, Wednesday on the House floor. Rep. John Yarmuth/AP hide caption

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Marina Lonina, 18, is accused of live-streaming the alleged rape of a 17-year-old female friend. Franklin County, Ohio, Sheriff's Office/AP hide caption

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Live-Streaming Of Alleged Rape Shows Challenges Of Flagging Video In Real Time

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Facebook CEO Mark Zuckerberg talks about the company's 10-year road map during his keynote address Tuesday at the F8 Facebook Developer Conference in San Francisco. Eric Risberg/AP hide caption

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Facebook's New Master Plan: Kill Other Apps

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When You Become The Person You Hate On The Internet

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The Benicia Compliments page sprang up on Instagram as a platform for girls attending Benicia High School to tag each other in positive social media posts. Shawn Wen/Youth Radio hide caption

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Teen Girls Flip The Negative Script On Social Media

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Ray Tomlinson celebrates after receiving the 2009 Prince of Asturias Award Laureate for the Technical and Scientific Research from Spain's Prince Felipe. Miguel Riopa/AFP/Getty Images hide caption

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Nancy Jo Sales interviewed more than 200 teenage girls about their social media and Internet habits while researching her book American Girls. Knopf hide caption

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Teen Girls And Social Media: A Story Of 'Secret Lives' And Misogyny

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A satellite image of the archaeological site of Tanis, after processing. Sarah Parcak used satellite data to find the ancient Egyptian city. Courtesy of Sarah Parcak hide caption

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Space Archaeologist Wants Your Help To Find Ancient Sites

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Patrick Kovarik/AFP/Getty Images

McCartney's Octopus Moji

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Comedian and actress Grace Helbig is a star on YouTube. "Having an audience that listens to and resonates with your creative ideas is invaluable," she says. Paul A. Hebert/Invision/AP hide caption

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How Do You Measure Passion? Figuring The Value Of Social Media Followers

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